A111624 - OEIS

%I #4 Mar 30 2012 18:36:50

%S 1,4,5,2,7,8,3,10,11,8,13,14,5,16,17,12,19,20,14,22,23,24,25,26,9,28,

%T 29,10,31,32,33,34,35,24,37,38,26,40,41,14,43,44,15,46,47,16,49,50,51,

%U 52,53,36,55,56,38,58,59,60,61,62,63,64,65,22,67,68,46,70,71,72,73,74,75

%N Second lower diagonal of A109626.

%t f[n_] := f[n] = Block[{a}, a[0] = 1; a[l_] := a[l] = Block[{k = 1, s = Sum[ a[i]*x^i, {i, 0, l - 1}]}, While[ IntegerQ[ Last[ CoefficientList[ Series[(s + k*x^l)^(1/n), {x, 0, l}], x]]] != True, k++ ]; k]; Table[a[j], {j, 0, 128}]]; g[n_, m_] := f[n][[m]]; Table[ g[n, n - 2], {n, 3, 75}]

%Y Cf. A109626.

%K nonn

%O 3,2

%A _Paul D. Hanna_ and _Robert G. Wilson v_, Aug 01 2005