id:A027924 - OEIS Search Results

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a(n) = least k such that 1+2+...+k >= 1^3 + 2^3 + ... + n^3.

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1, 4, 8, 14, 21, 30, 40, 51, 64, 78, 93, 110, 129, 148, 170, 192, 216, 242, 269, 297, 327, 358, 390, 424, 460, 496, 535, 574, 615, 658, 701, 747, 793, 841, 891, 942, 994, 1048, 1103, 1160, 1218, 1277, 1338, 1400, 1464, 1529, 1595, 1663, 1732, 1803, 1875 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=round(sqrt(1/2)n(n+1)). - Ralf Stephan (ralf(AT)ark.in-berlin.de), Jan 24 2003`
	PROGRAM	`(PARI) for(n=1, 100, print1(round(sqrt(1/2)n(n+1))", ")).`
	CROSSREFS	`Cf. A000537.` `Sequence in context: A121896 A131937 A088804 this_sequence A006578 A122224 A004797` `Adjacent sequences: A027921 A027922 A027923 this_sequence A027925 A027926 A027927`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`
	EXTENSIONS	`More terms from Ralf Stephan (ralf(AT)ark.in-berlin.de), Jan 24 2003`

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Last modified July 25 02:12 EDT 2008. Contains 142294 sequences.

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