The On-Line Encyclopedia of Integer Sequences (OEIS)

Revisions by Joerg Arndt

(See also Joerg Arndt's wiki page
and changes approved by Joerg Arndt)

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
newer changes | Showing entries 11-20 | older changes

A347044

Greatest divisor of n with half (rounded up) as many prime factors (counting multiplicity) as n.
(history; published version)

#21 by Joerg Arndt at Sat Nov 02 04:37:29 EDT 2024

STATUS

proposed

reviewed

A347043

Smallest divisor of n with half (rounded up) as many prime factors (counting multiplicity) as n.
(history; published version)

#30 by Joerg Arndt at Sat Nov 02 04:37:26 EDT 2024

STATUS

proposed

reviewed

A347042

Number of divisors d > 1 of n such that bigomega(d) divides bigomega(n), where bigomega = A001222.
(history; published version)

#21 by Joerg Arndt at Sat Nov 02 04:37:23 EDT 2024

STATUS

proposed

reviewed

A342087

Number of chains of divisors starting with n and having no adjacent parts x <= y^2.
(history; published version)

#8 by Joerg Arndt at Sat Nov 02 04:37:19 EDT 2024

STATUS

proposed

reviewed

A342084

Number of chains of distinct strictly superior divisors starting with n.
(history; published version)

#19 by Joerg Arndt at Sat Nov 02 04:37:15 EDT 2024

STATUS

proposed

reviewed

A342083

Number of chains of strictly inferior divisors from n to 1.
(history; published version)

#20 by Joerg Arndt at Sat Nov 02 04:37:11 EDT 2024

STATUS

proposed

reviewed

A242034

a(n)=lpf(A243937(n)-3), where lpf = least prime factor (A020639).
(history; published version)

#30 by Joerg Arndt at Sat Nov 02 04:37:07 EDT 2024

STATUS

proposed

reviewed

A242033

a(n)=lpf(A245024(n)-1), where lpf=least prime factor (A020639).
(history; published version)

#32 by Joerg Arndt at Sat Nov 02 04:37:04 EDT 2024

STATUS

proposed

reviewed

A377484

a(n) = Product_{d|n, d>1} (d - 1).
(history; published version)

#25 by Joerg Arndt at Sat Nov 02 04:36:57 EDT 2024

STATUS

proposed

reviewed

A180492

Product of remainders of prime(n) mod k, for k = 2,3,4,...,prime(n)-1
(history; published version)

#15 by Joerg Arndt at Sat Nov 02 04:25:08 EDT 2024

STATUS

reviewed

approved