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Search: id:A131205
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| A131205 |
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a(n) = a(n-1) + a(floor(n/2)) + a(ceiling(n/2)). |
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+0
1
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| 1, 3, 7, 13, 23, 37, 57, 83, 119, 165, 225, 299, 393, 507, 647, 813, 1015, 1253, 1537, 1867, 2257, 2707, 3231, 3829, 4521, 5307, 6207, 7221, 8375, 9669, 11129, 12755, 14583, 16613, 18881, 21387, 24177, 27251, 30655, 34389, 38513, 43027, 47991
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..1000
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FORMULA
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Partial sums of A000123: (1, 2, 4, 6, 10, 14, 20, 26,...). - Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 26 2007
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CROSSREFS
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Cf. A033485, A000123.
Cf. A131205.
Adjacent sequences: A131202 A131203 A131204 this_sequence A131206 A131207 A131208
Sequence in context: A101301 A103116 A075321 this_sequence A058682 A081995 A053599
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 22 2007
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