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

Author

Olivier Gérard

Keywords

• nonn
• base
• easy

Links

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

Programs

Mathematica

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