A031491 Numbers whose base-8 representation has 2 fewer 0's than 7's.

63, 127, 191, 255, 319, 383, 447, 463, 471, 479, 487, 495, 503, 505, 506, 507, 508, 509, 510, 639, 703, 767, 831, 895, 959, 975, 983, 991, 999, 1007, 1015, 1017, 1018, 1019, 1020, 1021, 1022

Offset

1,1

Links

Table of n, a(n) for n=1..37.

Mathematica

Select[Range[1100], DigitCount[#, 8, 7]==DigitCount[#, 8, 0]+2&] (* Harvey P. Dale, Mar 31 2018 *)

Crossrefs

Cf. A007094.

Sequence in context: A031468 A045064 A043450 * A044250 A044631 A045136

Adjacent sequences: A031488 A031489 A031490 * A031492 A031493 A031494

Keyword

nonn,base

Author

Clark Kimberling

Status

approved