1,5

Row sums = A001629, starting (1, 2, 5, 10, 20 38, 71, 130,...). Rows tend to A001792 staring from the right: (1, 3, 8, 20, 48, 112,...).

Antidiagonals of the array: A007318 * A002260(transform), where A002260 = (1; 1,2; 1,2,3;...).

First few rows of the array are:

1,...1,...1,...1,...1,...1,...;

1,...3,...3,...3,...3,...3,...;

1,...5,...8,...8,...8,...8,...;

1,...7,..16,..20,..20,..20,...;

1,...9,..27,..43,..48,..48,...;

1,..11,..41,..83,.106,.112,...;

...

First few rows of the triangle are:

1;

1, 1;

1, 3, 1;

1, 5, 3, 1;

1, 7, 8, 3, 1;

1, 9, 16, 8, 3, 1;

1, 11, 27, 20, 8, 3, 1;

1, 13, 41, 43, 20, 8, 3, 1;

...

Cf. A002260, A001792, A001629.

Sequence in context: A152720 A131247 A114278 this_sequence A131767 A026780 A026703

Adjacent sequences: A134833 A134834 A134835 this_sequence A134837 A134838 A134839

nonn,tabl

Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 12 2007