id:A130566 - OEIS Search Results

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Pyramidal 47-gonal numbers.

+0
2

1, 48, 186, 460, 915, 1596, 2548, 3816, 5445, 7480, 9966, 12948, 16471, 20580, 25320, 30736, 36873, 43776, 51490, 60060, 69531, 79948, 91356, 103800, 117325, 131976, 147798, 164836, 183135, 202740, 223696, 246048, 269841, 295120, 321930, 350316, 380323 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(15 n + 1) (n + 2) (n + 1)/2.`
	CROSSREFS	`Sequence in context: A131683 A066134 A005911 this_sequence A157923 A072254 A062248` `Adjacent sequences: A130563 A130564 A130565 this_sequence A130567 A130568 A130569`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Oct 06 2007, based on a suggestion from an unknown correspondent in 2004.`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research