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1, 2, 0, 3, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n), n = 1,2,4,8,..; = 1 + Log(base 2) of n; and the rest zeros.
Dirichlet g.f. 1/(1-2^(-s))^2, i.e., Dirichlet convolution of A036987 (right-shifted, assuming offset 1 there) with itself.
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EXAMPLE
| a(8) = 4 = sum of row 8 terms of A103994: (1 + 1 + 0 + 1 + 0 + 0 + 0 + 1).
a(8) = 4 = 1 + Log(base 2) of 8.
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CROSSREFS
| Cf. A103994.
Sequence in context: A138806 A181105 A142971 * A114511 A085199 A085200
Adjacent sequences: A104114 A104115 A104116 * A104118 A104119 A104120
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KEYWORD
| nonn,easy,mult
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 15 2007
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