A039001 Numbers whose base-3 representation has the same number of 1's and 2's.

0, 5, 7, 11, 15, 19, 21, 29, 33, 44, 45, 50, 52, 55, 57, 63, 68, 70, 76, 83, 87, 98, 99, 104, 106, 116, 128, 132, 135, 140, 142, 146, 150, 154, 156, 163, 165, 171, 176, 178, 184, 189, 194, 196, 200, 204, 208, 210, 220, 226, 228, 245, 249, 260, 261, 266, 268

Offset

1,2

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Prog

(PARI) isok(m) = my(d=digits(m, 3)); #select(x->(x==1), d) == #select(x->(x==2), d); \\ Michel Marcus, Mar 23 2020

Crossrefs

Cf. A007089, A062756, A081603.

Sequence in context: A029624 A075317 A134643 * A023741 A096819 A032699

Adjacent sequences: A038998 A038999 A039000 * A039002 A039003 A039004

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved