A084972 - OEIS

%I #2 Mar 30 2012 17:30:55

%S 1,2,3,4,7,12,20,35,57,102,182,323,585,1061,1943,3521,6606

%N When A058033 first reaches n.

%t Primorial[n_] := Product[Prime[i], {i, 1, n}]; f[n_] := Block[{k = 2, p = 1}, While[q = Floor[ Log[2, Primorial[k]]]; q - p != n, k++; p = q]; k - 1]; Table[ f[n], {n, 1, 17}]

%Y Cf. A058033.

%K nonn

%O 1,2

%A _Robert G. Wilson v_, May 22 2003