A127979 - OEIS

This site is supported by donations to The OEIS Foundation.

A127979

Numbers of the form (5n/18 + 19/54)2^(n) - ((-1)^(n - 1) )(3n + 4)/27.

1, 4, 9, 24, 55, 130, 293, 660, 1459, 3206, 6977, 15096, 32463, 69482, 148061, 314332, 665067, 1402958, 2951545, 6194368, 12971271, 27107634, 56545429, 117751204, 244823075, 508287510, 1053857713, 2182280840, 4513692479, 9325646586 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`Bosma W. 2001. Signed bits and fast exponentiation. J. Th. des Nombres de Bordeaux Vol.13, Fasc. 1`
	LINKS	`Bosma W. Signed bits and fast exponentiation.`
	FORMULA	`a(n) = (5n/18 + 19/54)2^(n) - ((-1)^(n - 1) )(3n + 4)/27`
	MATHEMATICA	`Table[(5n/18 + 19/54)2^(n) - ((-1)^(n - 1) )(3n + 4)/27, {n, 1, 100}] (Artur Jasinski)`
	CROSSREFS	`Cf. A073371, A127976, A127978, A073371.` `Sequence in context: A158141 A056575 A056032 * A112262 A077922 A081149` `Adjacent sequences: A127976 A127977 A127978 * A127980 A127981 A127982`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Feb 09 2007`

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

Last modified February 17 00:09 EST 2012. Contains 205978 sequences.