id:A118403 - OEIS Search Results

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Unsigned row sums of triangle A118401; a(n) = A118402(n^2-n+2), where A118402 is the row sums of triangle A118400.

+0
3

1, 1, 3, 5, 9, 15, 23, 33, 45, 59, 75, 93, 113, 135, 159, 185, 213, 243, 275, 309, 345, 383, 423, 465, 509, 555, 603, 653, 705, 759, 815, 873, 933, 995, 1059, 1125, 1193, 1263, 1335, 1409, 1485, 1563, 1643, 1725, 1809, 1895, 1983, 2073, 2165, 2259, 2355 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`G.f.: A(x) = (1-2x+2x^2)*(1+x^2)/(1-x)^3.`
	PROGRAM	`(PARI) {a(n)=polcoeff((1-2x+2x^2)(1+x^2)/(1-x+xO(x^n))^3, n, x)}`
	CROSSREFS	`Cf. A118401, A118402.` `Sequence in context: A022940 A025207 A027688 this_sequence A033498 A057259 A045599` `Adjacent sequences: A118400 A118401 A118402 this_sequence A118404 A118405 A118406`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Apr 27 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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