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Search: id:A134311
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| 1, 2, 7, 20, 51, 122, 281, 632, 1399, 3062, 6645, 14324, 30707, 65522
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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Binomial transform of [1, 1, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12,...].
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EXAMPLE
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a(4) = 20 = sum of row 4 terms of triangle A134310: (4 + 4 + 5 + 7).
a(4) = 20 = (1, 3, 3, 1) dot (1, 1, 4, 4) = (1 + 3 + 12 + 4).
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CROSSREFS
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Cf. A134310.
Adjacent sequences: A134308 A134309 A134310 this_sequence A134312 A134313 A134314
Sequence in context: A136907 A090145 A123203 this_sequence A066373 A096005 A050532
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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), Oct 21 2007
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