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 A342699 Numbers k such that A342698(k) = k. 2
 0, 1, 3, 7, 9, 12, 15, 17, 19, 24, 25, 28, 31, 33, 35, 39, 48, 49, 51, 56, 57, 60, 63, 65, 67, 71, 79, 96, 97, 99, 103, 112, 113, 115, 120, 121, 124, 127, 129, 131, 135, 143, 153, 159, 192, 193, 195, 199, 204, 207, 224, 225, 227, 231, 240, 241, 243, 248, 249 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Equivalently, these are the numbers k such that each bit in the binary representation of k is next to a bit with the same value (and we consider that the first bit is next to the last bit). Hence, all terms of A033015 belong to this sequence. LINKS Rémy Sigrist, Table of n, a(n) for n = 1..10000 PROG (PARI) is(n) = my (w=#binary(n)); sum(k=0, w-1, ((bittest(n, (k-1)%w)+bittest(n, k%w)+bittest(n, (k+1)%w))>=2) * 2^k)==n CROSSREFS Cf. A033015, A342698. Sequence in context: A110404 A366529 A190366 * A284819 A190742 A289906 Adjacent sequences: A342696 A342697 A342698 * A342700 A342701 A342702 KEYWORD nonn,base AUTHOR Rémy Sigrist, Mar 18 2021 STATUS approved

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)