A141583 - OEIS

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A141583

Squares of tribonacci numbers A000213.

1, 1, 1, 9, 25, 81, 289, 961, 3249, 11025, 37249, 126025, 426409, 1442401, 4879681, 16507969, 55845729, 188925025, 639128961, 2162157001, 7314525625, 24744863025, 83711270241, 283193201281, 958035736849, 3241011678961 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	COMMENTS	`Partial sums are in A107240.`
	FORMULA	`a(n) = (A000213(n))^2. O.g.f.: -(x^3-x^2+3x-1)(1+x)^2/((x^3-x^2-x-1)(x^3+x^2+3x-1)). a(n) = 2a(n-1) +3a(n-2) +6a(n-3) -a(n-4) -a(n-6).`
	CROSSREFS	`Cf. A000213, A085697.` `Sequence in context: A166103 A192618 A110970 * A147413 A066137 A147428` `Adjacent sequences: A141580 A141581 A141582 * A141584 A141585 A141586`
	KEYWORD	`easy,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 19 2008`

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Last modified February 14 08:32 EST 2012. Contains 205614 sequences.