id:A153476 - OEIS Search Results

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Sum of first n even superperfect numbers A061652, divided by 2.

+0
3

1, 3, 11, 43, 2091, 34859, 165931, 537036843, 576460752840460331, 154742505487133287202850859, 40564973949808827981181705422891, 42535336430091257741749807110676449323 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Also, sum of first n superperfect numbers A019279, divided by 2, if there are no odd superperfect numbers.`
	FORMULA	`a(n) = A153475(n)/2 [From Max Alekseyev (maxale(AT)gmail.com), Jul 27 2009]`
	CROSSREFS	`Cf. A153474, A153475.` `Sequence in context: A126614 A000979 A123628 this_sequence A107290 A122393 A012880` `Adjacent sequences: A153473 A153474 A153475 this_sequence A153477 A153478 A153479`
	KEYWORD	`nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 27 2008`
	EXTENSIONS	`More terms from Max Alekseyev (maxale(AT)gmail.com), Jul 27 2009`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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