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

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.

Sequence in context: A190856 A127033 A028826 * A350425 A259627 A250475

Adjacent sequences: A254096 A254097 A254098 * A254100 A254101 A254102

Keyword

nonn

Author

Antti Karttunen, Feb 04 2015

Status

approved