A213040 Partial sums of A004738, leftmost column of the sequence of triangles defined in A206492.

1, 3, 4, 6, 9, 11, 12, 14, 17, 21, 24, 26, 27, 29, 32, 36, 41, 45, 48, 50, 51, 53, 56, 60, 65, 71, 76, 80, 83, 85, 86, 88, 91, 95, 100, 106, 113, 119, 124, 128, 131, 133, 134, 136, 139, 143, 148, 154, 161, 169, 176, 182, 187, 191, 194, 196, 197, 199, 202

Offset

0,2

Links

Table of n, a(n) for n=0..58.

Formula

a(n) = Sum_{k=0..n} A004738(k).

For n>0, a(n) = a(n-1) + A004738(n).

Crossrefs

Cf. A004738, A206492.

Sequence in context: A158705 A047415 A087805 * A173318 A153380 A268273

Adjacent sequences: A213037 A213038 A213039 * A213041 A213042 A213043

Keyword

nonn,easy

Author

Alex Ratushnyak, Jun 28 2012

Status

approved