A117489 Row sums of A117488 which has 1, 3, 5, 7, ... entries per row.

1, 6, 30, 115, 374, 1079, 2848, 7005, 16285, 36117, 76981, 158563, 317014, 617349, 1174400, 2187584, 3998057, 7181362, 12696179, 22120549, 38023748, 64546190, 108296742, 179729895, 295244362, 480358370, 774483006, 1238052200

Offset

1,2

Comments

Note that the central diagonal of table A117488 is 1 2 5 20 ...

Links

Table of n, a(n) for n=1..28.

Example

A117488 begins
1
1 2 3
1 2 5 8 14
1 2 5 10 18 30 49
1 2 5 10 20 34 59 94 149
so a(n) begins
1 6 30 115 374 ...

Crossrefs

Cf. A115994, A117488.

Sequence in context: A292296 A003211 A334331 * A050510 A319889 A319870

Adjacent sequences: A117486 A117487 A117488 * A117490 A117491 A117492

Keyword

nonn

Author

Alford Arnold, Mar 22 2006

Extensions

More terms from David Wasserman, Nov 03 2010

Status

approved