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1, 6, 1, 6, 12, 1, 6, 18, 18, 1, 6, 24, 36, 24, 1, 6, 30, 60, 60, 30, 1, 6, 36, 90, 120, 90, 36, 1, 6, 42, 126, 210, 210, 126, 42, 1, 6, 48, 168, 336, 420, 336, 168, 48, 1, 6, 54, 216, 504, 756, 756, 504, 216, 54, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Row sums = A048489: (1, 8, 22, 50, 106, 218,...).
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LINKS
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Table of n, a(n) for n=1..55.
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FORMULA
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6*A007318 -5*I; A007318 = Pascal's triangle, I = Identity matrix.
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EXAMPLE
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First few rows of the triangle are:
1;
6, 1;
6, 12, 1;
6, 18, 18, 1;
6, 24, 36, 24, 1;
6, 30, 60, 60, 30, 1;
6, 36, 90, 120, 90, 36, 1;
...
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CROSSREFS
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Cf. A131110, A131111, A131112, A131113, A131115, A048488, A007318.
Sequence in context: A222068 A157292 A159828 * A199230 A199101 A127778
Adjacent sequences: A131111 A131112 A131113 * A131115 A131116 A131117
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson, Jun 15 2007
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STATUS
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approved
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