A108462 - OEIS

This site is supported by donations to The OEIS Foundation.

A108462

Number of factorizations of (n,n) into pairs (i,j) with i,j>=1, not both 1.

1, 2, 2, 9, 2, 15, 2, 31, 9, 15, 2, 92, 2, 15, 15, 109, 2, 92, 2, 92, 15, 15, 2, 444, 9, 15, 31, 92, 2, 203, 2, 339, 15, 15, 15, 712, 2, 15, 15, 444, 2, 203, 2, 92, 92, 15, 2, 1903, 9, 92, 15, 92, 2, 444, 15, 444, 15, 15, 2, 1663, 2, 15, 92, 1043, 15, 203, 2, 92, 15, 203, 2 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`(a,b)(x,y)=(ax,by)` `a(n) depends only on prime signature of n (cf. A025487). So a(24) = a(375) since 24=2^33 and 375=3*5^3 both have prime signature (3,1).`
	CROSSREFS	`Main diagonal of A108461. a(A025487)=A108463. a(p^k)=A002774(k). a(A002110)=A020557.` `Sequence in context: A037290 A155936 A167594 * A011403 A113554 A085846` `Adjacent sequences: A108459 A108460 A108461 * A108463 A108464 A108465`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jun 03 2005`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 23:21 EST 2012. Contains 205860 sequences.