Row sums of triangle A120894 (cascadence of 1+x+x^2).

Terms

a(0) =1a(1) =3a(2) =10a(3) =33a(4) =106a(5) =336a(6) =1056a(7) =3296a(8) =10234a(9) =31648a(10) =97551a(11) =299888a(12) =919865a(13) =2816291a(14) =8608712a(15) =26278538a(16) =80120533a(17) =244022331a(18) =742525242a(19) =2257527861a(20) =6858558246a(21) =20822959508a(22) =63181453350a(23) =191601205342a(24) =580749971840