A133252 - OEIS

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A133252

Partial sums of A006000.

1, 5, 17, 45, 100, 196, 350, 582, 915, 1375, 1991, 2795, 3822, 5110, 6700, 8636, 10965, 13737, 17005, 20825, 25256, 30360, 36202, 42850, 50375, 58851, 68355, 78967, 90770, 103850, 118296, 134200, 151657, 170765, 191625, 214341, 239020, 265772 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Prime for a(1) = 5, a(2) = 17, then never again?`
	FORMULA	`a(n) = SUM[i=0..n] A006000(i) = SUM[i=0..n](i+1)(i^2+i+2)/2. a(n) = (1/2)((1/4)(n^4 + 2 n^3 + n^2) + (1/3)(2n^3 + 3n^2 + n) + (1/2)*(3n^2 + 3n) + 2n)).`
	CROSSREFS	`Cf. A006000.` `Sequence in context: A190969 A099451 A174794 * A048612 A147050 A147397` `Adjacent sequences: A133249 A133250 A133251 * A133253 A133254 A133255`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Dec 19 2007`

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Last modified February 14 20:13 EST 2012. Contains 205663 sequences.