OFFSET
1,2
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..500
EXAMPLE
MATHEMATICA
$MaxExtraPrecision = Infinity;
z = 800; p[k_] := p[k] = Sum[1/(h*(h + 1)*(h + 2)*(h + 3)), {h, 1, k}];
N[Table[1/18 - p[n], {n, 1, z/10}]]
f[n_] := f[n] = Select[Range[z], 1/18 - p[#] < 1/n^3 &, 1]
u = Flatten[Table[f[n], {n, 1, z}]] (* A248186 *)
Flatten[Position[Differences[u], 0]] (* A248187 *)
Flatten[Position[Differences[u], 1]] (* A248188 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 04 2014
STATUS
approved