id:A129232 - OEIS Search Results

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a(n)=Floor(n*r)+Floor((n-2)*r)+Floor((n-4)*r)+...+Floor(k*r), where r = 2^(1/2) and k=0 if n is even, k=1 if n is odd.

+0
2

0, 1, 2, 5, 7, 12, 15, 21, 26, 33, 40, 48, 56, 66, 75, 87, 97, 111, 122, 137, 150, 166, 181, 198, 214, 233, 250, 271, 289, 312, 331, 355, 376, 401, 424, 450, 474, 502, 527, 557, 583, 614, 642, 674, 704, 737, 769, 803, 836, 872, 906, 944, 979, 1018, 1055, 1095 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n) = sum(A129231(k): k=0,1,...,n).`
	CROSSREFS	`Cf. A129231.` `Adjacent sequences: A129229 A129230 A129231 this_sequence A129233 A129234 A129235` `Sequence in context: A088821 A057897 A022758 this_sequence A088822 A080182 A001318`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Apr 04 2007`

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Last modified October 12 14:39 EDT 2008. Contains 144830 sequences.

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