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 A113580 Define prime(0) = 1; then a(n) = sum prime(d), where d ranges over the decimal digits of n. 2
 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 3, 4, 5, 7, 9, 13, 15, 19, 21, 25, 4, 5, 6, 8, 10, 14, 16, 20, 22, 26, 6, 7, 8, 10, 12, 16, 18, 22, 24, 28, 8, 9, 10, 12, 14, 18, 20, 24, 26, 30, 12, 13, 14, 16, 18, 22, 24, 28, 30, 34, 14, 15, 16, 18, 20, 24, 26, 30, 32, 36, 18, 19, 20, 22, 24, 28 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 EXAMPLE a(123) = prime(1) + prime(2) + prime(3) = 2 + 3 + 5 = 10. a(10001) = 2 + 1 + 1 + 1 + 2 = 7. MATHEMATICA f[n_] := Plus @@ (IntegerDigits[n] /. {0 -> 1, 1 -> 2, 2 -> 3, 3 -> 5, 4 -> 7, 5 -> 11, 6 -> 13, 7 -> 17, 8 -> 19, 9 -> 23}); Table[ f[n], {n, 0, 75}] (* Robert G. Wilson v *) CROSSREFS Cf. A113581; first occurrence in A113736. Sequence in context: A242125 A124180 A151796 * A242124 A117322 A242123 Adjacent sequences:  A113577 A113578 A113579 * A113581 A113582 A113583 KEYWORD nonn,base AUTHOR Amarnath Murthy, Nov 06 2005 EXTENSIONS More terms from Robert G. Wilson v, Nov 08 2005 STATUS approved

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Last modified December 3 00:59 EST 2021. Contains 349445 sequences. (Running on oeis4.)