id:A056820 - OEIS Search Results

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Euler totient function of Cullen numbers (A002064), n*2^n +1.

+0
1

1, 2, 6, 20, 48, 132, 240, 528, 1364, 4180, 7560, 20784, 42768, 70992, 151632, 446208, 986880, 1688400, 4006800, 6080256, 13843440, 42125380, 79567488, 152712000, 292573440, 526051328, 797636448, 2942476992, 7257012896 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`Table[ EulerPhi[ n*2^n + 1 ], {n, 1, 30} ]`
	CROSSREFS	`Cf. A002064.` `Sequence in context: A036689 A139115 A121128 this_sequence A027558 A066397 A060344` `Adjacent sequences: A056817 A056818 A056819 this_sequence A056821 A056822 A056823`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 31 2000`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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