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A100256 Squares of second pentagonal numbers: (1/4) n^2(3n+1)^2. 1
0, 4, 49, 225, 676, 1600, 3249, 5929, 10000, 15876, 24025, 34969, 49284, 67600, 90601, 119025, 153664, 195364, 245025, 303601, 372100, 451584, 543169, 648025, 767376, 902500, 1054729, 1225449, 1416100, 1628176, 1863225, 2122849 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
G.f.: x*(4+29*x+20*x^2+x^3)/(1-x)^5. [Colin Barker, Feb 14 2012]
CROSSREFS
Equals A005449(n)^2. Cf. A100255.
Sequence in context: A166826 A295535 A078187 * A163944 A000596 A113525
KEYWORD
nonn
AUTHOR
Ralf Stephan, Nov 13 2004
STATUS
approved

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Last modified June 20 01:56 EDT 2024. Contains 373510 sequences. (Running on oeis4.)