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A163821
a(n) = product of decimal digits of A000043(n).
0
2, 3, 5, 7, 3, 7, 9, 3, 6, 72, 0, 14, 10, 0, 126, 0, 32, 42, 120, 96, 3888, 324, 6, 1701, 0, 0, 4032, 1152, 0, 0, 0, 45360, 12960, 27440, 23328, 3024, 0, 102060, 27216, 0, 0, 97200, 0, 100800, 158760, 0, 0, 67200
OFFSET
1,1
FORMULA
a(n) = A007954(A000043(n)). - Amiram Eldar, Oct 16 2024
MATHEMATICA
a[n_] := Times @@ IntegerDigits[MersennePrimeExponent[n]]; Array[a, 48] (* Amiram Eldar, Oct 16 2024 *)
CROSSREFS
Sequence in context: A073034 A239037 A126050 * A156294 A126607 A124322
KEYWORD
base,nonn,more
AUTHOR
Boris Hostnik (megpplus(AT)siol.net), Aug 04 2009
EXTENSIONS
a(38)-a(39) corrected and a(40)-a(48) added by Amiram Eldar, Oct 16 2024
STATUS
approved