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Search: id:A131228
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| 1, 3, 4, 1, 3, 7, 3, 1, 3, 10, 1, 3, 1, 3, 13, 3, 1, 3, 1, 3, 16, 1, 3, 1, 3, 1, 3, 19, 3, 1, 3, 1, 3, 1, 3, 22, 1, 3, 1, 3, 1, 3, 25, 3, 1, 3, 1, 3, 1, 3, 1, 3, 28
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OFFSET
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0,2
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COMMENT
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Row sums = A131229, numbers congruent to {1,7} mod 10: (1, 7, 11, 17, 21, 27, 31,...).
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FORMULA
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3*A051340 - 2*A128174 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
3, 4;
1, 3, 7;
3, 1, 3, 10;
1, 3, 1, 3, 13;
...
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CROSSREFS
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Cf. A051340, A128174, A131229, A131227.
Sequence in context: A088197 A087517 A128529 this_sequence A131129 A087694 A010262
Adjacent sequences: A131225 A131226 A131227 this_sequence A131229 A131230 A131231
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 20 2007
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