A143125 Sum {j=1..n} j*A001462(j).

1, 5, 11, 23, 38, 62, 90, 122, 167, 217, 272, 344, 422, 506

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Formula

Sum {j=1..n} j*A001462(j), where A001462 = Golomb's sequence, (1, 2, 2, 3, 3, 4, 4, 4,...). Row sums of triangle A143124.

Example

a(4) = 23 = 1*1 + 2*2 + 3*2 + 4*12 = (1 + 4 + 6 + 12), given Golomb's sequence (1, 2, 2, 3, 3, 4, 4, 4,...).
a(4) = 23 = sum of row 4 terms of triangle A143124: (8 + 7 + 5 + 3).

Crossrefs

Cf. A001462, A143124.

Sequence in context: A169744 A190148 A281875 * A147081 A046628 A262284

Adjacent sequences: A143122 A143123 A143124 * A143126 A143127 A143128

Keyword

nonn

Author

Gary W. Adamson, Jul 26 2008

Status

approved