A025544 a(n) = sum of the exponents in the prime factorization of the least common multiple of the first n composite numbers.

2, 3, 4, 5, 6, 6, 7, 7, 8, 8, 8, 8, 9, 9, 10, 11, 12, 12, 12, 13, 13, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 19, 19, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 25

Offset

1,1

Links

Table of n, a(n) for n=1..74.

Formula

a(n) = A001222(A025543(n+1)).

Crossrefs

Sequence in context: A110010 A091987 A357149 * A327706 A121856 A332061

Adjacent sequences: A025541 A025542 A025543 * A025545 A025546 A025547

Keyword

nonn

Author

Clark Kimberling

Extensions

Extended by Ray Chandler, May 01 2007

Status

approved