id:A081589 - OEIS Search Results

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Third row of Pascal-(1,5,1) array A081580.

+0
3

1, 13, 61, 145, 265, 421, 613, 841, 1105, 1405, 1741, 2113, 2521, 2965, 3445, 3961, 4513, 5101, 5725, 6385, 7081, 7813, 8581, 9385, 10225, 11101, 12013, 12961, 13945, 14965, 16021, 17113, 18241, 19405, 20605, 21841, 23113, 24421, 25765, 27145 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=1-6n+18n^2. G.f. (1+5x)^2/(1-x)^3.`
	CROSSREFS	`Cf. A016921, A081590.` `Sequence in context: A140615 A086361 A119151 this_sequence A139880 A127876 A047673` `Adjacent sequences: A081586 A081587 A081588 this_sequence A081590 A081591 A081592`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 23 2003`

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Last modified September 5 19:27 EDT 2008. Contains 143485 sequences.

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