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A023831 Sum of exponents in prime-power factorization of C(4n,n+1). 1
2, 4, 4, 7, 7, 8, 8, 11, 11, 12, 8, 12, 13, 15, 13, 18, 14, 18, 14, 18, 20, 18, 17, 21, 22, 20, 19, 22, 20, 24, 19, 26, 24, 26, 23, 28, 27, 27, 27, 30, 29, 31, 27, 30, 30, 30, 27, 34, 31, 33, 31, 34, 33, 33, 30, 34, 33, 36, 31, 37, 38, 39, 37, 42, 39, 41, 38, 42, 43, 43, 38, 46, 44, 44, 44, 46, 46 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Table[PrimeOmega[Binomial[4 n, n + 1]], {n, 77}] (* Ivan Neretin, Nov 08 2017 *)

CROSSREFS

Sequence in context: A328853 A105774 A130805 * A233272 A023844 A132083

Adjacent sequences:  A023828 A023829 A023830 * A023832 A023833 A023834

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 1 22:12 EST 2021. Contains 349435 sequences. (Running on oeis4.)