id:A026950 - OEIS Search Results

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a(n) = Sum{(k+1)*T(n,k)}, 0<=k<=n, T given by A026374.

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1, 3, 10, 25, 75, 175, 500, 1125, 3125, 6875, 18750, 40625, 109375, 234375, 625000, 1328125, 3515625, 7421875, 19531250, 41015625, 107421875, 224609375, 585937500, 1220703125, 3173828125, 6591796875, 17089843750, 35400390625 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(n+2)[7+3(-1)^n]/4 * 5^[(n-1)/2].`
	CROSSREFS	`Sequence in context: A026985 A027227 A027228 this_sequence A095052 A131433 A110713` `Adjacent sequences: A026947 A026948 A026949 this_sequence A026951 A026952 A026953`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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