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A104251 Sum of nonprime digits of n-th prime. 3
0, 0, 0, 0, 2, 1, 1, 10, 0, 9, 1, 0, 5, 4, 4, 0, 9, 7, 6, 1, 0, 9, 8, 17, 9, 2, 1, 1, 10, 2, 1, 2, 1, 10, 14, 2, 1, 7, 7, 1, 10, 10, 11, 10, 10, 19, 2, 0, 0, 9, 0, 9, 5, 1, 0, 6, 15, 1, 0, 9, 8, 9, 0, 2, 1, 1, 1, 0, 4, 13, 0, 9, 6, 0, 9, 8, 17, 9, 5, 13, 14, 5, 5, 4, 13, 8, 17, 4, 11, 10, 10, 13, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..93.

FORMULA

a(n)=A007605(n)-A104250(n)

EXAMPLE

a(6)=1 because sum of composie (nonprime) digits of Prime[6]=13 is 1.

CROSSREFS

Sum of prime digits (2, 3, 5, 7) of n-th prime: A104250. Primes: A000040, sum of digits of primes: A007605.

Sequence in context: A155718 A256168 A054768 * A153731 A262226 A154989

Adjacent sequences:  A104248 A104249 A104250 * A104252 A104253 A104254

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Feb 26 2005

STATUS

approved

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Last modified December 17 04:09 EST 2017. Contains 296096 sequences.