A065412 a(n) = (A005867(n+1) - A000165(n))/96.

0, 0, 0, 0, 1, 20, 480, 10560, 272640, 8709120, 280627200, 10644480000, 439404134400, 18781972070400, 873535419187200, 45751167221760000, 2665172872986624000, 160281737951182848000, 10593163661832880128000

Offset: 0

Author

Alford Arnold, Nov 23 2001

Keywords

• easy
• nonn

Comments

A005867 can be generated recursively using A006093 and A000165 can be generated recursively using the even numbers. Since all primes after 2 are odd, (A005867 - A000165)/96 is an integer.

Examples

			A005867(n+1) begins 1, 2, 8, 48, 480, 5760, 92160, ...
A000165(n) begins   1, 2, 8, 48, 384, 3840, 46080, ...
difference begins   0, 0, 0,  0,  96, 1920, 46080, ... .
		

Crossrefs

Cf. A000165, A005867, A006093.

Extensions

More terms from Jason Earls, Apr 23 2002