A031008 Position of n-th 0 in A031007.

0, 7, 21, 35, 49, 63, 77, 91, 92, 95, 98, 101, 104, 107, 110, 112, 133, 154, 175, 196, 217, 238, 239, 242, 245, 248, 251, 254, 257, 259, 280, 301, 322, 343, 364, 385, 386, 389, 392, 395, 398, 401, 404, 406, 427, 448, 469, 490, 511

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Programs

Mathematica

Rest[Flatten[Position[Flatten[Table[Reverse[IntegerDigits[n,7]],{n,0,200}]],0]]]-1 (* Harvey P. Dale, Jun 08 2017 *)

Extensions

Missing a(1)=0 inserted by Sean A. Irvine, Apr 10 2020