|
Search: id:A158842
|
|
|
| A158842 |
|
Row sums of triangle A158841, binomial transform of [1, 3, 6, 3, 0, 0, 0,...] |
|
+0
2
|
|
| 1, 4, 13, 31, 61, 106, 169, 253, 361, 496, 661, 859, 1093, 1366
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
FORMULA
|
Row sums of triangle A158841, binomial transform of [1, 3, 6, 3, 0, 0, 0,...].
a(n)=1+A027480(n-1) = 1+n(n+1)(n-1)/2. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 28 2009]
|
|
EXAMPLE
|
a(4) = 31 = (1, 3, 3, 1) dot (1, 3, 6, 3) = (1 + 9 + 18 + 3). a(4) = 31 = sum of row 4 terms, triangle A158841: (13 + 9 + 6 + 3).
|
|
CROSSREFS
|
Cf. A158841
Sequence in context: A042487 A154753 A106302 this_sequence A100136 A097120 A098536
Adjacent sequences: A158839 A158840 A158841 this_sequence A158843 A158844 A158845
|
|
KEYWORD
|
nonn,uned
|
|
AUTHOR
|
Gary W. Adamson & Roger L. Bagula (qntmpkt(AT)yahoo.com), Mar 28 2009
|
|
|
Search completed in 0.002 seconds
|
