id:A120416 - OEIS Search Results

Search: id:A120416

Displaying 1-1 of 1 results found.

page 1

A120416

Numbers n such that n^2+1 divides n!.

+0
1

18, 21, 38, 43, 47, 57, 68, 70, 72, 73, 83, 99, 111, 117, 119, 123, 128, 132, 133, 142, 157, 172, 173, 174, 182, 185, 191, 192, 193, 200, 211, 212, 216, 233, 237, 239, 242, 251, 253, 255, 265, 268, 273, 278, 293, 294, 302, 305, 307, 313, 319, 322, 327, 336 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Hojoo Lee, Problems in elementary number theory, Problem A 26`
	FORMULA	`A002522(n) \| A000142(n)`
	EXAMPLE	`For the first number, n=18: 18^2+1=325 divides 18!=6402373705728000`
	CROSSREFS	`Sequence in context: A001101 A088341 A105145 this_sequence A090891 A121851 A154151` `Adjacent sequences: A120413 A120414 A120415 this_sequence A120417 A120418 A120419`
	KEYWORD	`easy,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 07 2006`

page 1

Search completed in 0.002 seconds

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research