A152923 - OEIS

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A152923

2^(2p-1)/8, where p is A000043(n).

1, 4, 64, 1024, 4194304, 1073741824, 17179869184, 288230376151711744 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Ultraperfect numbers (A139306), divided by 8.`
	FORMULA	`a(n) = A139306(n)/8 = A152921(n)/4 = A152922(n)/2.`
	CROSSREFS	`Cf. A000043, A139292, A139306, A152921, A152922.` `Sequence in context: A154021 A013709 A139292 * A085807 A014729 A085532` `Adjacent sequences: A152920 A152921 A152922 * A152924 A152925 A152926`
	KEYWORD	`nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 15 2008`

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Last modified February 16 19:20 EST 2012. Contains 205945 sequences.