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 A104250 Sum of prime digits of n-th prime. 5
 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; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n)=A007605(n)-A104251(n) EXAMPLE a(6)=3 because sum of prime digits of Prime[6]=13 is 3. MATHEMATICA npd[n_]:=Total[Select[IntegerDigits[n], PrimeQ]]; Table[npd[p], {p, Prime[ Range[100]]}] (* Harvey P. Dale, Apr 24 2014 *) 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: A185107 A115259 A039709 * A171013 A020919 A126053 Adjacent sequences:  A104247 A104248 A104249 * A104251 A104252 A104253 KEYWORD nonn,base AUTHOR Zak Seidov, Feb 26 2005 STATUS approved

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