A116913 - OEIS

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A116913

Inverse Moebius transform of pentagonal numbers.

1, 6, 13, 28, 36, 69, 71, 120, 130, 186, 177, 301, 248, 363, 378, 496, 426, 663, 533, 798, 734, 897, 783, 1245, 961, 1254, 1210, 1547, 1248, 1914, 1427, 2016, 1806, 2148, 1926, 2821, 2036, 2685, 2522, 3270 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`See also: A000326 Pentagonal numbers: n(3n-1)/2. See also: A007437 Inverse Moebius transform of triangular numbers.`
	FORMULA	`a(n) = SUM[d\|n] d(3d-1)/2.`
	CROSSREFS	`Cf. A000326, A007437.` `Sequence in context: A183337 A173559 A086224 * A016071 A086652 A159694` `Adjacent sequences: A116910 A116911 A116912 * A116914 A116915 A116916`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Mar 19 2006`

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Last modified February 17 07:41 EST 2012. Contains 205998 sequences.