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A191576 Numbers n such that number of divisors of n equals the number of 1's in Gray code for n. 0
1, 2, 9, 10, 22, 25, 26, 34, 38, 46, 49, 58, 81, 94, 118, 121, 122, 134, 142, 148, 158, 164, 170, 172, 194, 206, 212, 226, 262, 292, 332, 356, 382, 386, 398, 404, 426, 428, 436, 446, 454, 478, 482, 502, 514, 526, 542, 548, 556, 578, 598, 602, 604, 618, 625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Numbers n such that A000005(n) = A005811(n).

LINKS

Table of n, a(n) for n=1..55.

PROG

(PARI) lista(nn) = {for (n=1, nn, if (numdiv(n)==sum(k=1, n, (-1)^((k/2^valuation(k, 2)-1)/2)), print1(n, ", ")); ); } \\ Michel Marcus, Apr 22 2013

CROSSREFS

Cf. A000005, A005811.

Sequence in context: A304441 A005695 A079747 * A081346 A301872 A290592

Adjacent sequences: A191573 A191574 A191575 * A191577 A191578 A191579

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, Jun 06 2011

EXTENSIONS

Entries corrected by R. J. Mathar, Jun 07 2011

STATUS

approved

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Last modified November 29 16:39 EST 2022. Contains 358431 sequences. (Running on oeis4.)