A216139 a(n) = conjectured number of integers k such that n^k has no four consecutive identical digits.

3674, 2385, 1836, 1608, 1438, 1333, 1239, 1201, 3, 1040, 1001, 978, 980, 948, 929, 881, 914, 852, 3, 828, 818, 834, 820, 819, 779, 786, 762, 750, 3, 708, 753, 759, 738, 676, 709, 685, 761, 703, 3, 703, 728, 707, 660, 675, 667, 633, 649, 660, 3

Offset

2,1

Links

Table of n, a(n) for n=2..50.

Crossrefs

Cf. A216063, A216064, A216065.

Sequence in context: A365612 A205821 A250895 * A250702 A307890 A103608

Adjacent sequences: A216136 A216137 A216138 * A216140 A216141 A216142

Keyword

nonn,base

Author

V. Raman, Sep 01 2012

Status

approved