

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
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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



PROG

(PARI) is(n) = my (w=#binary(n)); sum(k=0, w1, ((bittest(n, (k1)%w)+bittest(n, k%w)+bittest(n, (k+1)%w))>=2) * 2^k)==n


CROSSREFS



KEYWORD

nonn,base


AUTHOR



STATUS

approved



