A174935 a(n) = Sum_{k<=n} A007955(k) * A000027(k) = Sum_{k<=n} A007955(k) * k, where A007955(m) = product of divisors of m.

1, 5, 14, 46, 71, 287, 336, 848, 1091, 2091, 2212, 22948, 23117, 25861, 29236, 45620, 45909, 150885, 151246, 311246, 320507, 331155, 331684, 8294308, 8297433, 8315009, 8334692, 8949348, 8950189, 33250189

Offset

1,2

Links

Table of n, a(n) for n=1..30.

Example

For n = 4, A007955(n) = b(n): a(4) = b(1)*1 + b(2)*2 + b(3)* 3 + b(4)*4 = 1*1 + 2*2 + 3*3 + 8*4 = 46.

Crossrefs

Sequence in context: A270208 A271463 A272425 * A270620 A270636 A077335

Adjacent sequences: A174932 A174933 A174934 * A174936 A174937 A174938

Keyword

nonn

Author

Jaroslav Krizek, Apr 02 2010

Status

approved