



2, 3, 5, 6, 7, 9, 10, 12, 13, 15, 16, 18, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 33, 35, 36, 38, 39, 41, 42, 43, 45, 46, 48, 49, 51, 52, 54, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 69, 71, 72, 74, 75, 77, 78, 80, 81, 82, 84, 85, 87, 88, 90, 91, 93, 94, 95
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

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.


MATHEMATICA

$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 *)


CROSSREFS



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



