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

Author

Alex Ratushnyak, Jun 28 2012

Keywords

• nonn
• easy

Crossrefs

Cf. A004738, A206492.

Formula

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

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