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

1, 5, 11, 23, 38, 62, 90, 122, 167, 217, 272, 344, 422, 506, 596, 708, 827, 953, 1086, 1246, 1414, 1590, 1774, 1990, 2215, 2449, 2692, 2944, 3234, 3534, 3844, 4164, 4494, 4868, 5253, 5649, 6056, 6474, 6942, 7422, 7914, 8418, 8934, 9462, 10047, 10645, 11256, 11880, 12517, 13167

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..10000

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

Row sums of A143124.

Cf. A001462.

Sequence in context: A190148 A281875 A390551 * A147081 A046628 A262284

Adjacent sequences: A143122 A143123 A143124 * A143126 A143127 A143128

Keyword

nonn

Author

Gary W. Adamson, Jul 26 2008

Extensions

a(15) onwards from Andrew Howroyd, Sep 24 2025

Status

approved