A023749 Plaindromes: numbers whose digits in base 7 are in nondecreasing order.

0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 16, 17, 18, 19, 20, 24, 25, 26, 27, 32, 33, 34, 40, 41, 48, 57, 58, 59, 60, 61, 62, 65, 66, 67, 68, 69, 73, 74, 75, 76, 81, 82, 83, 89, 90, 97, 114, 115, 116, 117, 118, 122, 123, 124, 125, 130, 131, 132, 138, 139, 146, 171

Offset

1,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..4000

Mathematica

Select[Range[0, 171], LessEqual@@IntegerDigits[#, 7]&] (* Ray Chandler, Jan 06 2014 *)

Crossrefs

Sequence in context: A032895 A032854 A031992 * A022556 A250482 A172233

Adjacent sequences: A023746 A023747 A023748 * A023750 A023751 A023752

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved