S000294


Irregular triangle of numbers n such that 2^n does not contain 0, 1, …, 9.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16, 18, 19, 24, 25, 27, 28, 31, 32, 33, 34, 35, 36, 37, 39, 49, 51, 67, 72, 76, 77, 81, 86, 1, 2, 3, 5, 6, 8, 11, 12, 15, 16, 19, 23, 25, 28, 32, 33, 35, 38, 43, 52, 56, 59, 63, 66, 73, 91, 0, 2, 3, 4, 6, 12, 14, 16

1

S000294

The irregular triangle has 10 rows of different lengths.

T. D. Noe, Plot of 298 terms

T. D. Noe, Table of 298 terms

(Mma) k = 2; t = {}; Do[s = Position[Reverse[IntegerDigits[k^n]], i]; If[Length[s] == 0, AppendTo[t, n]], {i, 0, 9}, {n, 0, 1000}]; t

Cf. S000295-S000301.

nonn,base,tabf

T. D. Noe, Oct 14 2014

© Tony D Noe 2014-2015