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

Author

Alford Arnold, Mar 22 2006

Keywords

• nonn

Comments

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

Examples

			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.

Extensions

More terms from David Wasserman, Nov 03 2010