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

1,3

Links

Table of n, a(n) for n=1..35.

Formula

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

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 *)

Crossrefs

Cf. A128020.

Sequence in context: A091956 A107480 A345235 * A036241 A192633 A125028

Adjacent sequences: A128018 A128019 A128020 * A128022 A128023 A128024

Keyword

easy,nonn

Author

Leroy Quet, Feb 11 2007

Extensions

Extended by Ray Chandler, Feb 12 2007

Status

approved