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1, 4, 8, 11, 14, 17, 21, 24, 27, 30, 34, 37, 40, 44, 47, 50, 53, 57, 60, 63, 66, 70, 73, 76, 79, 83, 86, 89, 92, 96, 99, 102, 105, 109, 112, 115, 119, 122, 125, 128, 132, 135, 138, 141, 145, 148, 151, 154, 158, 161, 164, 167, 171, 174, 177, 180, 184, 187
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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The difference sequence of A248227 is (0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, ...), so that A248228 = (1, 4, 8, 11, 14, 17, 2,...) and A248229 = (2, 3, 5, 6, 7, 9, 10, 12, 13, 15, 16, 18,...), the complement of A248228.
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MATHEMATICA
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$MaxExtraPrecision = Infinity; z = 400; p[k_] := p[k] = Sum[1/h^4, {h, 1, k}];
N[Table[Zeta[4] - p[n], {n, 1, z/10}]]
f[n_] := f[n] = Select[Range[z], Zeta[4] - p[#] < 1/n^3 &, 1];
u = Flatten[Table[f[n], {n, 1, z}]] (* A248227 *)
Flatten[Position[Differences[u], 0]] (* A248228 *)
Flatten[Position[Differences[u], 1]] (* A248229 *)
f = Table[Floor[1/(Zeta[4] - p[n])], {n, 1, z}] (* A248230 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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