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A023987 Sum of exponents of primes in C(5n,3n)/C(3n,2n). 0
1, 2, 0, 2, 4, 2, 3, 5, 4, 5, 2, 2, 7, 5, 5, 7, 7, 7, 3, 9, 11, 3, 5, 6, 8, 11, 7, 9, 12, 10, 10, 10, 12, 11, 10, 13, 14, 13, 13, 14, 15, 14, 5, 8, 11, 8, 9, 9, 12, 14, 13, 16, 20, 12, 14, 17, 14, 19, 12, 17, 19, 17, 15, 15, 21, 20, 16, 19, 23, 16, 21, 21, 23, 22, 17, 22, 26, 24, 24, 26, 26, 24, 22, 23 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..84.

CROSSREFS

Sequence in context: A223487 A226911 A291956 * A021498 A025251 A193334

Adjacent sequences:  A023984 A023985 A023986 * A023988 A023989 A023990

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 25 16:50 EDT 2019. Contains 326324 sequences. (Running on oeis4.)