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A140735
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Triangle read by rows, X^n * [1,0,0,0,...]; where X = a tridiagonal matrix with (1,2,3,...) in the main diagonal and (1,1,1,...) in the sub and subsubdiagonals.
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2
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1, 1, 1, 1, 1, 3, 5, 2, 1, 1, 7, 19, 16, 12, 3, 1, 1, 15, 65, 90, 95, 46, 22, 4, 1, 1, 31, 211, 440, 630, 461, 295, 100, 35, 5, 1, 1, 63, 665, 2002, 3801, 3836, 3156, 1556, 710, 185, 51, 6, 1, 1, 127, 2059, 8736, 21672, 28819, 29729, 19440, 11102, 4116, 1456, 308, 70
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,6
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EXAMPLE
| First few rows of the triangle are:
1;
1, 1, 1;
1, 3, 5, 2, 1;
1, 7, 19, 16, 12, 3, 1;
1, 15, 65, 90, 95, 46, 22, 4, 1;
1, 31, 211, 440, 630, 461, 295, 100, 35, 5, 1;
1, 63, 665, 2002, 3801, 3836, 3156, 1556, 710, 185, 51, 6, 1;
...
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CROSSREFS
| Cf. A140733, A140744.
Sequence in context: A069111 A204161 A021288 * A183206 A197521 A161865
Adjacent sequences: A140732 A140733 A140734 * A140736 A140737 A140738
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), May 25 2008
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