id:A157968 - OEIS Search Results

Search: id:A157968

Displaying 1-1 of 1 results found.

page 1

2^n - 1 (A000225) where n is nonprime number (A141468).

+0
1

0, 1, 15, 63, 127, 255, 511, 1023, 4095, 16383, 32767, 65535, 262143, 1048575, 2097151, 4194303, 16777215, 33554431, 67108863, 134217727, 268435455, 1073741823, 4294967295 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(0) = 0 since 2^0 - 1 = 0 and 0 is nonprime, a(1) = 1 since 2^1 - 1 = 1 and 1 is nonprime, a(2) = 15 since 2^4 - 1 = 15 and 4 is nonprime, ...`
	CROSSREFS	`A000668` `Sequence in context: A066584 A065915 A062965 this_sequence A141759 A104473 A135972` `Adjacent sequences: A157965 A157966 A157967 this_sequence A157969 A157970 A157971`
	KEYWORD	`nonn`
	AUTHOR	`Jani Melik (jani.melik(AT)gmail.com), Mar 10 2009`

page 1

Search completed in 0.002 seconds

Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

AT&T Labs Research