Triangle T(n,k), 0<=k<=n, read by rows, given by [1, 2, 2, 4, 3, 6, 4, 8, 5, 10, 6, 12, . . . ] DELTA [2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, . . . ] where DELTA is the operator defined in A084938.

A108694

Triangle T(n,k), 0<=k<=n, read by rows, given by [1, 2, 2, 4, 3, 6, 4, 8, 5, 10, 6, 12, . . . ] DELTA [2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, . . . ] where DELTA is the operator defined in A084938.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =9a(5) =6a(6) =13a(7) =54a(8) =69a(9) =26a(10) =75a(11) =399a(12) =747a(13) =573a(14) =150a(15) =541a(16) =3508a(17) =8638a(18) =9998a(19) =5393a(20) =1082a(21) =4683a(22) =35817a(23) =109248a(24) =169038a(25) =139143a(26) =57585a(27) =9366a(28) =47293a(29) =416762

External references