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A079824
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Sum of numbers in n-th upward diagonal of triangle in A079823.
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2
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1, 2, 7, 12, 25, 37, 62, 84, 125, 160, 221, 272, 357, 427, 540, 632, 777, 894, 1075, 1220, 1441, 1717, 1882, 2092, 2405, 2652, 3017, 3304, 3725, 4055, 4536, 4912, 5457, 5882, 6495, 6972, 7657, 8189, 8950, 9540, 10381, 11032, 11957, 12672, 13685, 14467
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(2n) = (n/6)*(7*n^2 + 3*n + 2); a(2n-1) = (n/6)*(7*n^2 - 6*n + 5) . - DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Feb 16 2004
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CROSSREFS
| Cf. A079823.
Sequence in context: A135541 A180804 A122264 * A059329 A177747 A175879
Adjacent sequences: A079821 A079822 A079823 * A079825 A079826 A079827
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 11 2003
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EXTENSIONS
| More terms from Jason D. W. Taff (jtaff(AT)jburroughs.org), Oct 31 2003
More terms from DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Feb 16 2004
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