A138847 Row sums of a Collatz triangle.

1, 3, 7, 15, 20, 23, 29, 41, 65, 82, 93, 100, 114, 123, 141, 177, 202, 251, 284, 349, 392, 478, 535, 574, 652, 805, 910, 1113, 1248, 1518, 1703, 1826, 2072, 2241, 2570, 2789, 2948, 3243, 3812, 4191, 4474, 4979, 5356, 5607, 5774, 5885, 6107

Offset: 0

Author

Paul Barry, Mar 31 2008, Apr 02 2008

Keywords

• easy
• nonn

Crossrefs

Partial sums of A092892.

Row sums of A138895.

Formula

a(n) = Sum_{k=0..n} A092892(k).

a(n) = Sum_{k=0..n} A138895(n,k).