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Search: id:A137681
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| 1, 2, 4, 10, 23, 56, 132, 316, 752, 1793, 4272, 10183, 24266, 57833
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OFFSET
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1,2
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COMMENT
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Partial sums of A137681 prefaced with a 1 = left border of triangle A137680: (1, 1, 3, 7, 17, 40, 96, 228,...) = A137682. A variation of A137681 = column 2 of triangle A137680: (1, 0, 2, 4, 10, 23, 56, 132, 316,...).
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EXAMPLE
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a(4) = 10 = sum of row 4 terms of triangle A137680: (7 + 2 + 0 + 1).
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CROSSREFS
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Cf. A137680, A137682.
Sequence in context: A076875 A018111 A094987 this_sequence A127389 A032171 A127713
Adjacent sequences: A137678 A137679 A137680 this_sequence A137682 A137683 A137684
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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), Feb 05 2008
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