A024391 - OEIS

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A024391

2nd elementary symmetric function of the first n+1 positive integers congruent to 2 mod 3.

10, 66, 231, 595, 1275, 2415, 4186, 6786, 10440, 15400, 21945, 30381, 41041, 54285, 70500, 90100, 113526, 141246, 173755, 211575, 255255, 305371, 362526, 427350, 500500, 582660, 674541, 776881, 890445, 1016025, 1154440, 1306536, 1473186, 1655290 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`n(n+1)(3n+2)(3n+5)/8.` `O.g.f.: -x(10+16x+x^2)/(-1+x)^5 . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 14 2008`
	CROSSREFS	`Sequence in context: A198848 A140362 A159838 * A074362 A080421 A004310` `Adjacent sequences: A024388 A024389 A024390 * A024392 A024393 A024394`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.