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A061151
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1 + Sum_{n=1..inf} a_n x^n = 1/Product_{n=1..inf} (1+x^n)^ithprime(n).
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2
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1, -2, 0, -3, 5, -3, 14, -4, 25, -32, 16, -88, 18, -155, 108, -153, 393, -88, 855, -160, 1255, -974, 1122, -3172, 370, -6794, 383, -10017, 5004, -9460, 19380, -2635, 45790, 5008, 76263, -7353, 87597, -77967, 48886, -244397, -45016, -500016, -115318, -734277, 56213, -710603, 810177, -161662, 2432173, 910752, 4767086
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n)=1/n*Sum_{k=1..n} a(n-k)*b(k), k>0, a(0)=1, b(k)=Sum_{d|k} (-1)^(k/d)*d*ithprime(d).
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CROSSREFS
| Cf. A007441, A007445, A030009, A061150, A061152.
Sequence in context: A038072 A161481 A196503 * A094720 A155800 A079510
Adjacent sequences: A061148 A061149 A061150 * A061152 A061153 A061154
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KEYWORD
| easy,sign
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AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 16 2001
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