OFFSET
1,2
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..400
EXAMPLE
MATHEMATICA
z = 300; p[k_] := p[k] = Sum[1/(h*3^h), {h, 1, k}];
N[Table[Log[3/2] - p[n], {n, 1, z/5}]]
f[n_] := f[n] = Select[Range[z], Log[3/2] - p[#] < 1/6^n &, 1];
u = Flatten[Table[f[n], {n, 1, z}]] (* A248562 *)
Flatten[Position[Differences[u], 1]] (* A248563 *)
Flatten[Position[Differences[u], 2]] (* A248564 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 09 2014
STATUS
approved