A343719 - OEIS

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A343719

Indices at which record values occur in A343717.

0, 2, 6, 7, 8, 10, 13, 15, 19, 24, 34, 38, 45, 74, 93, 97, 122, 228, 478, 547, 556, 621, 745, 916, 1057, 1090, 1188, 1318, 1467, 1821, 2073, 2601

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..32.

Lucas A. Brown, Python program.

MATHEMATICA

With[{s = Array[Block[{m = #!, k = 0}, While[! PrimeQ[10^If[k == 0, 1, IntegerLength[k]]*m + k], k++]; k] &, 250] }, Map[FirstPosition[s, #][[1]] &, Union@ FoldList[Max, s]] ] (* Michael De Vlieger, May 17 2021 *)

PROG

(Python) # see linked program in A343717

CROSSREFS

Cf. A343717, A343718.

Sequence in context: A372588 A028774 A355160 * A028735 A267541 A325465

Adjacent sequences: A343716 A343717 A343718 * A343720 A343721 A343722

KEYWORD

nonn,base,more,hard

AUTHOR

Jon E. Schoenfield, May 17 2021

EXTENSIONS

a(20)-a(23) from Michael S. Branicky, May 18 2021

a(24) from Michael S. Branicky, May 19 2021

a(25)-a(31) from Chai Wah Wu, May 25 2021

a(32) from Lucas A. Brown, Dec 27 2022

STATUS

approved