id:A081351 - OEIS Search Results

Search: id:A081351

Displaying 1-1 of 1 results found.

page 1

First row in square maze array of natural numbers A081349.

+0
5

1, 8, 9, 24, 25, 48, 49, 80, 81, 120, 121, 168, 169, 224, 225, 288, 289, 360, 361, 440, 441, 528, 529, 624, 625, 728, 729, 840, 841, 960, 961, 1088, 1089, 1224, 1225, 1368, 1369, 1520, 1521, 1680, 1681, 1848, 1849, 2024, 2025, 2208, 2209, 2400, 2401, 2600 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Interleaves the odd squares A016754 with 8 times the triangular numbers A000217.`
	FORMULA	`a(n)= (n+1)(n+2)-(n+1)(-1)^n = 2C(n+2, 2)-C(n+1, 1)(-1)^n.`
	CROSSREFS	`Cf. A081350, A081352.` `Sequence in context: A048124 A046258 A074344 this_sequence A032462 A077599 A109097` `Adjacent sequences: A081348 A081349 A081350 this_sequence A081352 A081353 A081354`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 19 2003`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research