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A154521 The prime(n)-th digit of the concatenated positive nonprimes. 0
4, 6, 9, 0, 4, 5, 8, 0, 2, 6, 7, 2, 4, 5, 8, 2, 6, 8, 1, 4, 5, 8, 2, 5, 0, 4, 5, 7, 8, 1, 0, 2, 5, 6, 2, 0, 0, 1, 1, 4, 6, 1, 0, 2, 2, 2, 2, 3, 4, 3, 6, 0, 4, 4, 6, 8, 2, 5, 5, 6, 5, 1, 6, 9, 7, 1, 7, 8, 4, 8, 6, 8, 9, 9, 9, 0, 2, 0, 6, 0, 3, 1, 7, 1, 2, 1, 4, 2, 0, 3, 2, 7, 4, 3, 4, 7, 9, 4, 5, 6, 6, 8, 2, 4, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The digits of A129808 at prime indices.

LINKS

Table of n, a(n) for n=1..105.

FORMULA

a(n) = A129808(prime(n)) .

MAPLE

a129808 := [1] : for n from 4 to 400 do if not isprime(n) then a129808 := [op(a129808), op(ListTools[Reverse](convert(n, base, 10))) ] ; fi; od:

for n from 1 do p := ithprime(n) ; printf("%d, ", op(p, a129808) ) ; od: # R. J. Mathar, Aug 03 2009

CROSSREFS

Cf. A000040, A154513, A154520.

Sequence in context: A198733 A010478 A106146 * A129112 A239634 A175013

Adjacent sequences:  A154518 A154519 A154520 * A154522 A154523 A154524

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, Jan 11 2009

EXTENSIONS

Edited and corrected by R. J. Mathar, Aug 03 2009

STATUS

approved

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Last modified September 18 17:45 EDT 2019. Contains 327178 sequences. (Running on oeis4.)