A128035 a(0)=a(1)=1. a(n) = the multiple of n which is >= a(n-1)+a(n-2) and is < a(n-1)+a(n-2)+n.

1, 1, 2, 3, 8, 15, 24, 42, 72, 117, 190, 308, 504, 819, 1330, 2160, 3504, 5678, 9198, 14877, 24080, 38976, 63074, 102051, 165144, 267200, 432354, 699570, 1131928, 1831524, 2963460, 4794987, 7758464, 12553464, 20311940, 32865420, 53177364

Offset

0,3

Links

Table of n, a(n) for n=0..36.

Formula

a(n) = n * ceiling[(a(n-1)+a(n-2))/n].

Mathematica

f[l_List] := Block[{n = Length[l]}, Append[l, n*(Ceiling[(l[[ -1]] + l[[ -2]])/n])]]; Nest[f, {1, 1}, 36] (* Ray Chandler, Feb 12 2007 *)

Crossrefs

Cf. A128034.

Sequence in context: A174019 A356371 A293389 * A003473 A095373 A249357

Adjacent sequences: A128032 A128033 A128034 * A128036 A128037 A128038

Keyword

easy,nonn

Author

Leroy Quet, Feb 11 2007

Extensions

Extended by Ray Chandler, Feb 12 2007

Status

approved