First column and main diagonal of triangle A092686, in which the convolution of each row with {1,2} produces a triangle that, when flattened, equals the flattened form of A092686.

A092687

First column and main diagonal of triangle A092686, in which the convolution of each row with {1,2} produces a triangle that, when flattened, equals the flattened form of A092686.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =16a(4) =46a(5) =132a(6) =384a(7) =1120a(8) =3278a(9) =9612a(10) =28236a(11) =83072a(12) =244752a(13) =722048a(14) =2132704a(15) =6306304a(16) =18666190a(17) =55300732a(18) =163968612a(19) =486528288a(20) =1444571068a(21) =4291629384a(22) =12756459936a(23) =37934818112a(24) =112855778768a(25) =335867740704a(26) =999895548736

External references