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A101338
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Anti-diagonal sums in A101321.
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1
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1, 2, 4, 9, 20, 41, 77, 134, 219, 340, 506, 727, 1014, 1379, 1835, 2396, 3077, 3894, 4864, 6005, 7336, 8877, 10649, 12674, 14975, 17576, 20502, 23779, 27434, 31495, 35991, 40952, 46409, 52394, 58940, 66081, 73852, 82289, 91429, 101310, 111971
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Contribution from Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 25 2010: (Start)
Equals binomial transform of [1, 1, 1, 2, 1, 0, 0, 0,...]. Example: a(5)
= 20 = [1, 1, 1, 2, 1] dot [1, 4, 6, 4, 1] = (1 + 4 + 6 + 8 + 1). (End)
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FORMULA
| n^4/24 + n^3/12 - n^2/24 + 11*n/12 + 1.
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CROSSREFS
| Sequence in context: A034749 A053024 A090166 * A018102 A018103 A175104
Adjacent sequences: A101335 A101336 A101337 * A101339 A101340 A101341
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KEYWORD
| nonn,easy
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AUTHOR
| Eugene McDonnell (eemcd(AT)mac.com), Dec 24 2004
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