A081687 - OEIS

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A081687

A sum of decreasing powers.

1, 2, 2, 20, 542, 8132, 94502, 964700, 9138782, 82619732, 724180502, 6213565580, 52507598222, 438786732932, 3636161064902, 29939329241660, 245281233244862, 2001531240407732, 16280816416067702, 132088684297864940 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Binomial transform of A081686`
	FORMULA	`a(n)=8^n-7^n-6^n-5^n+3*4^n`
	CROSSREFS	`Cf. A081690.` `Sequence in context: A002907 A184717 A134046 * A082811 A014353 A153438` `Adjacent sequences: A081684 A081685 A081686 * A081688 A081689 A081690`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 30 2003`

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Last modified February 13 20:19 EST 2012. Contains 205553 sequences.