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Search: id:A131772
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| A131772 |
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Partial sums (A131771) equal this sequence excluding zeros located at positions {m*(m+1)/2, m>=0}, with a(0)=1. |
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3
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| 1, 0, 1, 2, 0, 4, 4, 8, 0, 12, 20, 20, 32, 0, 52, 72, 104, 104, 156, 0, 228, 332, 436, 592, 592, 820, 0, 1152, 1588, 2180, 2772, 3592, 3592, 4744, 0, 6332, 8512, 11284, 14876, 18468, 23212, 23212, 29544, 0, 38056, 49340, 64216, 82684, 105896, 129108, 158652
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OFFSET
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0,4
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EXAMPLE
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Partial sums (A131771) begin:
[1,1,2,4,4,8,12,20,20,32,52,72,104,104,156,228,332,436,592,...].
Second partial sums (A131770) begin:
[1,2,4,8,12,20,32,52,72,104,156,228,332,436,592,...].
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PROGRAM
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(PARI)
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CROSSREFS
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Cf. A131770, A131771 (partial sums).
Sequence in context: A094403 A129760 A057377 this_sequence A021493 A084247 A070692
Adjacent sequences: A131769 A131770 A131771 this_sequence A131773 A131774 A131775
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Jul 14 2007
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