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Search: id:A131113
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| 1, 5, 1, 5, 10, 1, 5, 15, 15, 1, 5, 20, 30, 20, 1, 5, 25, 50, 50, 25, 1, 5, 30, 75, 100, 75, 30, 1, 5, 35, 105, 175, 175, 105, 35, 1, 5, 40, 140, 280, 350, 280, 140, 40, 1, 5, 45, 180, 420, 630, 630, 420, 180, 45, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums = A048487: (1, 6, 16, 36, 76, 156,...).
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FORMULA
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5*A007318 - 4*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;
5, 1;
5, 10, 1;
5, 15, 15, 1;
5, 20, 30, 20, 1;
5, 25, 50, 50, 25, 1;
5, 30, 75, 100, 75, 30, 1;
...
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CROSSREFS
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Cf. A131110, A131112, A131114, A131115, A048487, A007318.
Sequence in context: A129766 A120283 A103986 this_sequence A139426 A046611 A101692
Adjacent sequences: A131110 A131111 A131112 this_sequence A131114 A131115 A131116
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 15 2007
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