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A023834
Sum of exponents in prime-power factorization of C(4n,2n).
1
2, 3, 5, 6, 6, 7, 11, 9, 11, 12, 12, 13, 15, 14, 15, 15, 16, 15, 18, 17, 20, 22, 22, 22, 23, 22, 23, 22, 23, 25, 28, 25, 25, 29, 28, 28, 32, 30, 32, 31, 30, 31, 34, 34, 34, 34, 36, 35, 37, 34, 36, 38, 38, 38, 40, 38, 41, 42, 42, 40, 44, 46, 44, 43, 43, 44, 46, 42, 46, 47, 47, 46, 48, 47, 50, 51, 50
OFFSET
1,1
LINKS
MATHEMATICA
Table[Total[FactorInteger[Binomial[4 n, 2 n]][[All, 2]]], {n, 77}] (* Ivan Neretin, Oct 26 2017 *)
CROSSREFS
Sequence in context: A309560 A128054 A175081 * A084735 A002734 A367417
KEYWORD
nonn
STATUS
approved