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

Author

Clark Kimberling

Keywords

• nonn

Formula

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

Extensions

Extended by Ray Chandler, May 01 2007