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Search: id:A128091
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OFFSET
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1,2
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FORMULA
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Row sums of unsigned triangle A128090 a(n) = (n-1)*A045991(n) + n^2
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EXAMPLE
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a(4) = 160 = sum of row 4 terms of A128090: (48 + 48 + 48 + 16) = 3*A045991(4) + 4^2; where A045991 = (0, 0, 4, 18, 48, 100,...).
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CROSSREFS
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Cf. A128077, A128090, A045991.
Sequence in context: A118838 A153828 A100648 this_sequence A119950 A055367 A097555
Adjacent sequences: A128088 A128089 A128090 this_sequence A128092 A128093 A128094
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 14 2007
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