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A023840 Sum of exponents in prime-power factorization of C(5n,n-3). 1
0, 3, 5, 5, 7, 8, 8, 11, 11, 10, 12, 14, 13, 14, 16, 16, 14, 18, 17, 17, 18, 18, 19, 25, 23, 23, 25, 24, 23, 24, 23, 26, 24, 24, 25, 26, 27, 27, 28, 29, 25, 30, 32, 31, 31, 30, 33, 36, 33, 37, 38, 38, 39, 40, 36, 40, 39, 39, 39, 41, 38, 39, 43, 42, 37, 38, 41, 42, 44, 43, 43, 45, 43, 46, 50, 48, 49 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Ivan Neretin, Table of n, a(n) for n = 3..10000

MATHEMATICA

Table[PrimeOmega[Binomial[5 n, n - 3]], {n, 3, 79}] (* Ivan Neretin, Nov 08 2017 *)

CROSSREFS

Sequence in context: A168322 A138475 A195990 * A276501 A131421 A088743

Adjacent sequences:  A023837 A023838 A023839 * A023841 A023842 A023843

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Offset corrected to 3 by Ivan Neretin, Nov 08 2017

STATUS

approved

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Last modified August 10 16:56 EDT 2020. Contains 336381 sequences. (Running on oeis4.)