A370971 A008336(n) is divisible by the product of the primes p such that n/2 <= p < n; a(n) is the quotient.

1, 1, 1, 1, 8, 8, 4, 4, 32, 288, 144, 144, 12, 12, 6, 90, 1440, 1440, 80, 80, 4, 84, 42, 42, 1008, 25200, 12600, 340200, 12150, 12150, 405, 405, 12960, 427680, 213840, 7484400, 207900, 207900, 103950, 4054050, 162162000, 162162000, 3861000, 3861000, 87750, 1950, 975, 975, 46800, 2293200, 45864, 2339064, 44982

Offset: 1

Author

N. J. A. Sloane, Apr 13 2024

Keywords

• nonn

Examples

			For n= 7, A008336(7) = 20. The only prime with 3.5 <= p < 7 is 5, so a(7) = 20/5 = 4.
For n= 8, A008336(7) = 140. The only primes with 4 <= p < 8 are 5 and 7, so a(8) = 140/(5*7) = 4.
		

Links

• N. J. A. Sloane, Table of n, a(n) for n = 1..2732

Crossrefs

Cf. A008336, A055773 (note that A055773 has offset 0).

Formula

a(n) = A008336(n)/A055773(n-1).