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A023838 Sum of exponents in prime-power factorization of C(5n,n-1). 1
0, 2, 3, 5, 5, 7, 8, 9, 8, 10, 10, 12, 14, 13, 15, 14, 14, 16, 14, 17, 17, 18, 18, 21, 18, 22, 24, 23, 23, 24, 24, 24, 23, 23, 24, 25, 24, 26, 28, 29, 25, 30, 27, 29, 33, 30, 30, 32, 32, 33, 33, 37, 37, 38, 38, 37, 36, 40, 39, 44, 39, 41, 40, 39, 37, 39, 38, 39, 42, 41, 44, 44, 43, 43, 44, 46, 48, 49 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..10000

MATHEMATICA

Join[{0}, Table[Total[Transpose[FactorInteger[Binomial[5 n, n-1]]] [[2]]], {n, 2, 80}]] (* Harvey P. Dale, Dec 31 2012 *)

CROSSREFS

Sequence in context: A163867 A077381 A225636 * A246795 A089625 A092391

Adjacent sequences:  A023835 A023836 A023837 * A023839 A023840 A023841

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 20 01:22 EDT 2020. Contains 337235 sequences. (Running on oeis4.)