The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A006125

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A006125

a(n) = 2^(n*(n-1)/2).
(history; published version)

#241 by N. J. A. Sloane at Thu Oct 31 01:33:13 EDT 2024

STATUS

proposed

approved

#240 by Peter Bala at Sat Oct 26 12:42:11 EDT 2024

STATUS

editing

proposed

#239 by Peter Bala at Fri Oct 25 15:40:57 EDT 2024

FORMULA

a(bn) = Product_{1 <= j <= i <= n-1} (i + j)/(2*i - 2*j + 1). Cf. A007685. - Peter Bala, Oct 25 2024

#238 by Peter Bala at Fri Oct 25 15:36:14 EDT 2024

FORMULA

a(b) = Product_{1 <= j <= i <= n-1} (i + j)/(2*i - 2*j + 1). Cf. A007685. - Peter Bala, Oct 25 2024

#237 by Peter Bala at Fri Oct 25 15:34:50 EDT 2024

FORMULA

a(b) = Product_{1 <= j <= i <= n-1} (i + j - 1)/(2*i - 2*j + 1). - Peter Bala, Oct 25 2024

#236 by Peter Bala at Fri Oct 25 15:33:29 EDT 2024

FORMULA

a(b) = Product_{1 <= j <= i <= n-1} (i + j - 1)/(2*i - 2*j + 1). - Peter Bala, Oct 25 2024

CROSSREFS

Cf. A000169, A000295, A036442, A059167, A100743, A136284, A327078.

STATUS

approved

editing

#235 by Charles R Greathouse IV at Sat Oct 19 15:57:32 EDT 2024

LINKS

Thierry de la Rue and Élise Janvresse, <a href="https://images-archive.math.cnrs.fr/Pavages-aleatoires-par-touillage-de-dominos.html">Pavages aléatoires par touillage de dominos</a>, Images des Mathématiques, CNRS, 2023. In French.

Discussion

Sat Oct 19

15:57

OEIS Server: https://oeis.org/edit/global/3000

#234 by Michael De Vlieger at Thu Apr 25 11:24:06 EDT 2024

STATUS

reviewed

approved

#233 by Stefano Spezia at Thu Apr 25 11:22:12 EDT 2024

STATUS

proposed

reviewed

#232 by Stefano Spezia at Thu Apr 25 11:22:01 EDT 2024

STATUS

editing

proposed