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A215736 a(n) is the first digit to appear n times in succession in a power of 7. 12
1, 1, 7, 9, 5, 7, 3, 1, 0, 0, 3, 4, 6, 5, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..15.

MATHEMATICA

n = 1; x = 1; lst = {};

For[i = 1, i <= 10000, i++,

z = Split[IntegerDigits[x]]; a = Length /@ z; b = Max[a];

For[j = n, j <= b, j++,

  AppendTo[lst, First[First[Part[z, First[Position[a, b]]]]]]; n++

]; x = 7 x ]; lst (* Robert Price, Mar 16 2019 *)

CROSSREFS

Cf. A215730, A045875, A215732.

Sequence in context: A093206 A070693 A198417 * A132715 A154910 A063603

Adjacent sequences:  A215733 A215734 A215735 * A215737 A215738 A215739

KEYWORD

nonn,base,more

AUTHOR

V. Raman, Aug 22 2012

EXTENSIONS

a(10) added by V. Raman, Nov 23 2013

a(11)-a(13) from Giovanni Resta, Apr 19 2016

a(14)-a(15) from Bert Dobbelaere, Feb 15 2019

STATUS

approved

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Last modified July 19 12:35 EDT 2019. Contains 325159 sequences. (Running on oeis4.)