A128021 a(n) = A128020(n)/n.

1, 1, 2, 3, 5, 8, 14, 25, 44, 79, 144, 264, 487, 905, 1689, 3167, 5962, 11261, 21337, 40540, 77219, 147418, 282017, 540533, 1037823, 1995814, 3843790, 7413023, 14314803, 27675286, 53565070, 103782323, 201274808, 390709922, 759093562

Offset: 1

Author

Leroy Quet, Feb 11 2007

Keywords

• easy
• nonn

Crossrefs

Cf. A128020.

Programs

Mathematica

f[l_List] := Block[{n = Length[l] + 1},Append[l, (1 + Floor[Sum[k*l[[k]], {k, n - 1}]/n])]];Nest[f, {}, 37] (* Ray Chandler, Feb 12 2007 *)

Formula

a(n) = 1 + floor(sum{k=1 to n-1} A128020(k) /n).

Extensions

Extended by Ray Chandler, Feb 12 2007