A134826 Row sums of triangle A134285, called s2(3)'.

1, 4, 14, 58, 214, 908, 3442, 14444, 56386, 234476, 920490, 3847998, 15165982, 62944212, 250787568, 1036586952, 4132605038, 17106500792, 68303652958, 281749732730, 1130378730046, 4648910236412, 18657451711020, 76808828008438

Offset: 1

Author

Wolfdieter Lang, Nov 13 2007

Keywords

• nonn
• easy

Crossrefs

Cf. A134827 (alternating row sums of triangle A134285).

Formula

a(n) = Sum_{m=1..n} A134285(n,m), n>=1.