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A152274 Number of 2's among the digits of all n-digit primes. 9
1, 2, 29, 359, 3515, 35666, 361054, 3647203, 36746382, 369719841, 3715552230, 37310055810, 374416981198, 3755522785108 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

CROSSREFS

Cf. A130817, A152272, A152273, A152275, A152276, A152277, A152278, A152279, A152280, A152281.

Sequence in context: A091716 A198698 A094940 * A183722 A104535 A264175

Adjacent sequences:  A152271 A152272 A152273 * A152275 A152276 A152277

KEYWORD

base,nonn

AUTHOR

Jon E. Schoenfield, Dec 01 2008

EXTENSIONS

a(12)-a(14) from Giovanni Resta, Jul 20 2015

STATUS

approved

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Last modified July 24 05:05 EDT 2021. Contains 346273 sequences. (Running on oeis4.)