A327988 The zeros of A327987.

0, 2, 8, 10, 26, 32, 34, 40, 50, 58, 74, 82, 106, 122, 128, 136, 146, 160, 170, 178, 194, 202, 218, 226, 274, 296, 298, 314, 346, 362, 370, 386, 394, 424, 458, 466, 482, 512, 514, 530, 538, 544, 554, 562, 578, 586, 626, 634, 640, 674, 680, 698, 706, 746, 776

Offset

1,2

Comments

For k > 0 the nonnegative integers k such that Sum_{d|k} k & (k/d) = 0, where & is the bitwise AND operator.

Links

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

Maple

select(n -> A327987(n) = 0, [$0..777]);

Prog

(Magma) [0] cat [k:k in [1..800]| &+[BitwiseAnd(d, k div d):d in Divisors(k)] eq 0]; // Marius A. Burtea, Oct 11 2019

Crossrefs

Cf. A327987, A327989.

Sequence in context: A002510 A247592 A102943 * A062880 A066707 A107227

Adjacent sequences: A327985 A327986 A327987 * A327989 A327990 A327991

Keyword

nonn

Author

Peter Luschny, Oct 11 2019

Status

approved