id:A053159 - OEIS Search Results

Search: id:A053159

Displaying 1-1 of 1 results found.

page 1

n+cototient(n) is a power of 2.

+0
1

1, 3, 7, 10, 20, 31, 40, 80, 127, 160, 320, 322, 640, 644, 1280, 1288, 2560, 2576, 5120, 5152, 8191, 10240, 10304, 20480, 20608, 40960, 41216, 81920, 82432, 131071, 163840, 164864, 327680, 329728, 333634, 524287, 655360, 659456, 667268 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`See especially A053579 and also A053576, A053577.`
	FORMULA	`a(n)+A051953(n)=2*a(n)-A000010(n)=2^w for some w.`
	EXAMPLE	`Mersenne primes is a proper subset of this sequence: A(M)=2M-M+1=M+1=2^p`
	CROSSREFS	`A000043, A000668, A001348.` `Sequence in context: A167390 A000223 A031328 this_sequence A024464 A127277 A041437` `Adjacent sequences: A053156 A053157 A053158 this_sequence A053160 A053161 A053162`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Feb 29 2000`
	EXTENSIONS	`More terms from Reiner Martin (reinermartin(AT)hotmail.com), Dec 24 2001`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research