A100152 - OEIS

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A100152

Structured truncated cubic numbers.

1, 24, 100, 260, 535, 956, 1554, 2360, 3405, 4720, 6336, 8284, 10595, 13300, 16430, 20016, 24089, 28680, 33820, 39540, 45871, 52844, 60490, 68840, 77925, 87776, 98424, 109900, 122235, 135460, 149606, 164704 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Vincenzo Librandi, Table of n, a(n) for n = 1..5000`
	FORMULA	`a(n) = (1/6)n(31n^2-27n+2).` `G.f.: x(1+20x+10*x^2)/(1-x)^4. [Colin Barker, Jan 19 2012]`
	PROG	`(MAGMA) [(1/6)(31n^3-27n^2+2n): n in [1..40]]; // Vincenzo Librandi, Jul 19 2011`
	CROSSREFS	`Cf. A100151, A100153 for adjacent structured Archimedean solids; A100145 for more on structured polyhedral numbers. Similar to truncated cubic numbers A005912.` `Sequence in context: A042124 A042126 A157514 * A048529 A182675 A100155` `Adjacent sequences: A100149 A100150 A100151 * A100153 A100154 A100155`
	KEYWORD	`nonn,easy`
	AUTHOR	`James A. Record (james.record(AT)gmail.com), Nov 07 2004`

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Last modified February 16 23:45 EST 2012. Contains 205978 sequences.