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A248630 Numbers k such that A248630(k+1) = A248360(k) + 1.

%I A248630 #4 Oct 15 2014 21:02:35
%S A248630 7,11,15,18,22,25,28,31,34,37,39,42,45,48,51,53,56,59,61,64,67,69,72,
%T A248630 75,77,80,82,85,88,90,93,95,98,101,103,106,108,111,113,116,118,121,
%U A248630 124,126,129,131,134,136,139,141,144,146,149,151,154,156,159,161
%N A248630 Numbers k such that A248630(k+1) = A248360(k) + 1.
%H A248630 Clark Kimberling, <a href="/A248630/b248630.txt">Table of n, a(n) for n = 1..500</a>
%e A248630 (A248630(k+1) = A248360(k)) = (2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, ...), so that A248630 = (7, 11, 15, 18, ...).
%t A248630 z = 300; p[k_] := p[k] = Sum[(h^2/2^h), {h, 1, k}]
%t A248630 d = N[Table[6 - p[k], {k, 1, z/5}], 12]
%t A248630 f[n_] := f[n] = Select[Range[z], 6 - p[#] < 1/3^n &, 1]
%t A248630 u = Flatten[Table[f[n], {n, 1, z}]]  (* A248629 *)
%t A248630 d = Differences[u]
%t A248630 v = Flatten[Position[d, 1]]  (* A248630 *)
%Y A248630 Cf. A248630, A248629, A248632.
%K A248630 nonn,easy
%O A248630 1,1
%A A248630 _Clark Kimberling_, Oct 10 2014