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A215736
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a(n) is the first digit to appear n times in succession in a power of 7.
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12
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1, 1, 7, 9, 5, 7, 3, 1, 0, 0, 3, 4, 6, 5, 9
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listen;
history;
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internal format)
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OFFSET
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1,3
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LINKS
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Table of n, a(n) for n=1..15.
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MATHEMATICA
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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 *)
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CROSSREFS
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Cf. A215730, A045875, A215732.
Sequence in context: A093206 A070693 A198417 * A132715 A154910 A063603
Adjacent sequences: A215733 A215734 A215735 * A215737 A215738 A215739
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KEYWORD
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nonn,base,more
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AUTHOR
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V. Raman, Aug 22 2012
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EXTENSIONS
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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
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STATUS
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approved
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