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Search: id:A054552
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| 1, 2, 11, 28, 53, 86, 127, 176, 233, 298, 371, 452, 541, 638, 743, 856, 977, 1106, 1243, 1388, 1541, 1702, 1871, 2048, 2233, 2426, 2627, 2836, 3053, 3278, 3511, 3752, 4001, 4258, 4523, 4796, 5077, 5366, 5663, 5968, 6281, 6602, 6931, 7268, 7613, 7966, 8327
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Also indices in any spiral organized like A054551.
Equals binomial transform of [1, 1, 8, 0, 0, 0,...]. - Gary W. Adamson (qntmpkt(AT)yahoo.com), May 11 2008
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FORMULA
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G.f.: (1-x+8*x^2)/(1-x)^3.
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EXAMPLE
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10 11...: a(2)=11
.9 .2 .3: a(1)= 2
.8 .1 .4: a(0)= 1
.7 .6 .5
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MATHEMATICA
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lst={}; Do[p=4*n^2-3*n+1; AppendTo[lst, p], {n, 1, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 01 2008]
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CROSSREFS
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Cf. A054551, A108781.
Sequence in context: A104085 A080663 A139211 this_sequence A034534 A045493 A116038
Adjacent sequences: A054549 A054550 A054551 this_sequence A054553 A054554 A054555
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KEYWORD
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easy,nonn
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AUTHOR
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Enoch Haga and G. L. Honaker, Jr. (Enokh(AT)comcast.net), Apr 09 2000
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