id:A152777 - OEIS Search Results

Search: id:A152777

Displaying 1-1 of 1 results found.

page 1

7 times heptagonal numbers: 7n(5n-3)/2.

+0
2

0, 7, 49, 126, 238, 385, 567, 784, 1036, 1323, 1645, 2002, 2394, 2821, 3283, 3780, 4312, 4879, 5481, 6118, 6790, 7497, 8239, 9016, 9828, 10675, 11557, 12474, 13426, 14413, 15435, 16492, 17584, 18711, 19873, 21070, 22302, 23569 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`7 times 7-gonal numbers.`
	FORMULA	`a(n) = (35n^2 - 21n)/2 = A000566(n)*7.`
	MATHEMATICA	`s=0; lst={s}; Do[s+=n; AppendTo[lst, s], {n, 7, 8!, 35}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 03 2009]`
	CROSSREFS	`Cf. A000566.` `Sequence in context: A043131 A082701 A044145 this_sequence A003530 A163827 A015953` `Adjacent sequences: A152774 A152775 A152776 this_sequence A152778 A152779 A152780`
	KEYWORD	`easy,nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 13 2008`

page 1

Search completed in 0.002 seconds

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research