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A104250 Sum of prime digits of n-th prime. 4
2, 3, 5, 7, 0, 3, 7, 0, 5, 2, 3, 10, 0, 3, 7, 8, 5, 0, 7, 7, 10, 7, 3, 0, 7, 0, 3, 7, 0, 3, 9, 3, 10, 3, 0, 5, 12, 3, 7, 10, 7, 0, 0, 3, 7, 0, 2, 7, 11, 4, 8, 5, 2, 7, 14, 5, 2, 9, 16, 2, 5, 5, 10, 3, 6, 10, 6, 13, 10, 3, 11, 8, 10, 13, 10, 6, 3, 10, 0, 0, 0, 2, 3, 6, 3, 3, 0, 12, 0, 3, 7, 7, 7, 0, 0, 8, 5 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n)=A007605(n)-A104251(n)

EXAMPLE

a(6)=3 because sum of prime digits of Prime[6]=13 is 3.

CROSSREFS

Sum of nonprime digits (1, 4, 6, 8, 9) of n-th prime: A104251. Primes A000040: sum of digits of primes: A007605.

Sequence in context: A042939 A115259 A039709 * A171013 A020919 A126053

Adjacent sequences:  A104247 A104248 A104249 * A104251 A104252 A104253

KEYWORD

nonn,base

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Feb 26 2005

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.