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Search: id:A079393
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| A079393 |
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Ramanujan's tau function is negative. |
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+0
2
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| 2, 4, 6, 7, 9, 10, 12, 13, 17, 20, 21, 22, 25, 27, 30, 31, 32, 35, 37, 38, 39, 43, 44, 45, 46, 49, 51, 53, 56, 58, 59, 60, 65, 66, 67, 72, 75, 76, 77, 82, 83, 85, 89, 92, 93, 94, 96, 99
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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A000594(2)=-24, so a(1)=2
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PROGRAM
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(PARI) T(n)=n*(n+1)/2 rtau3(n)=local(y, j); y=0; j=1; while (T(j-1)<n, j++); j--; for (i=1, j, y=y-(-1)^i*(2*i-1)*x^(T(i-1))); y=y^8; polcoeff(y, n-1) for (n=1, 100, if (rtau3(n)<0, print1(n", ")))
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CROSSREFS
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Cf. A079392, A000594.
Sequence in context: A026516 A111094 A064427 this_sequence A047512 A026273 A080711
Adjacent sequences: A079390 A079391 A079392 this_sequence A079394 A079395 A079396
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KEYWORD
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nonn
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AUTHOR
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Jon Perry (perry(AT)globalnet.co.uk), Jan 06 2003
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