A031005 Position of n-th 6 in A030998.

6, 20, 34, 48, 62, 76, 77, 79, 81, 83, 85, 87, 89, 90, 111, 132, 153, 174, 195, 216, 218, 221, 224, 227, 230, 233, 236, 237, 258, 279, 300, 321, 342, 363, 365, 368, 371, 374, 377, 380, 383, 384, 405, 426, 447, 468, 489, 510, 512

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Programs

Mathematica

Flatten[Position[Flatten[IntegerDigits[#,7]&/@Range[0,200]],6]]-1 (* Harvey P. Dale, Mar 25 2019 *)