A053873 - OEIS

A053873

Numbers n such that OEIS sequence A_n contains n.

1, 2, 3, 5, 6, 8, 10, 14, 16, 19, 26, 27, 36, 37, 52, 59, 62, 69, 72, 115, 119, 120, 121, 134, 161, 164, 174, 177, 188, 189, 190, 193, 194, 195, 196, 209, 224, 265, 267, 277

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OFFSET

1,2

COMMENTS

A number n is in this sequence iff n appears anywhere in the terms of A_n, not just in the terms that are visible in the entry.

Is 53873 in this sequence? (A rhetorical question!) - Tanya Khovanova, Aug 09 2007

Is 53169 in this sequence? (A rhetorical question!). - Raymond Wang, Oct 07 2008

I skipped 241 since it appears that A000241(14) > 241, but as the 13th and further terms are not known this is not certain. The next term in the sequence is almost surely 319, but finding the least k for which A000319(k) = 319 requires calculating a chaotic sequence to high precision. - Charles R Greathouse IV, Jul 20 2007

241 is not in this sequence, since A000241(13) <= 225 and A000241(14) >= 0.8594*315 (see comments in A000241). - Danny Rorabaugh, Mar 13 2015

LINKS

Table of n, a(n) for n=1..40.

Charles R. Greathouse IV, Illustration of initial terms

Eric Weisstein's World of Mathematics, Graph Crossing Number

Wikipedia, Self-referentiality in the OEIS

Index entries for sequences whose definition involves A_n (or An).

EXAMPLE

4 is not in A000004, so 4 is not in this sequence.

60 is not in A000060, so 60 is not in this sequence.

86 is not in A000086, so 86 is not in this sequence.

CROSSREFS