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A216139 a(n) = conjectured number of integers k such that n^k has no four consecutive identical digits. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

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

CROSSREFS

Cf. A216063, A216064, A216065.

Sequence in context: A283202 A205821 A250895 * A250702 A307890 A103608

Adjacent sequences:  A216136 A216137 A216138 * A216140 A216141 A216142

KEYWORD

nonn,base

AUTHOR

V. Raman, Sep 01 2012

STATUS

approved

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Last modified December 8 20:37 EST 2021. Contains 349596 sequences. (Running on oeis4.)