A254099 - OEIS

A254099

Fixed points of A254115 and A254116.

1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 16, 20, 22, 24, 28, 32, 40, 44, 48, 56, 64, 80, 88, 96, 112, 128, 160, 176, 192, 224, 256, 317, 320, 352, 384, 448, 512, 634, 640, 704, 768, 896, 1024, 1268, 1280, 1408, 1536, 1792, 2048, 2536, 2560, 2816, 3072, 3584, 4096, 5072, 5120, 5632, 6144, 7168, 8192, 10144, 10240, 11264

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

If n is a member, then 2n is as well, and vice versa, thus the sequence is completely determined by its odd terms: 1, 3, 5, 7, 11, 317, 15989189, 16964283, ...

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..152

PROG

(PARI)

\\ Needs also code from A254116:

isA254099(n) = (A254116(n) == n);

i=0; for(n=1, 123456789, if(isA254099(n), i++; write("b254099.txt", i, " ", n)))

(Scheme, with Antti Karttunen's IntSeq-library)

(define A254099 (FIXED-POINTS 1 1 A254115))

CROSSREFS

Subsequence: A000079.

Cf. A254115, A254116.