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 A113581 Define prime(0) = 1; then a(n) = product prime(d), where d ranges over all the decimal digits of n. 5
 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 2, 4, 6, 10, 14, 22, 26, 34, 38, 46, 3, 6, 9, 15, 21, 33, 39, 51, 57, 69, 5, 10, 15, 25, 35, 55, 65, 85, 95, 115, 7, 14, 21, 35, 49, 77, 91, 119, 133, 161, 11, 22, 33, 55, 77, 121, 143, 187, 209, 253, 13, 26, 39, 65, 91, 143, 169, 221, 247, 299 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(14) = 14. a(17)=34. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 EXAMPLE a(123)= prime(1)*prime(2) *prime(3) = 2*3*5 = 30. MATHEMATICA f[n_] := Times @@ (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, 69}] (* Robert G. Wilson v *) CROSSREFS Cf. A113580; A113735 gives positions where A113581(n)==0 (mod n). Sequence in context: A095405 A242127 A242126 * A242125 A124180 A151796 Adjacent sequences:  A113578 A113579 A113580 * A113582 A113583 A113584 KEYWORD nonn,base AUTHOR Amarnath Murthy, Nov 06 2005 EXTENSIONS More terms from Robert G. Wilson v, Nov 07 2005 STATUS approved

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Last modified November 29 09:18 EST 2021. Contains 349416 sequences. (Running on oeis4.)