Triangle T(n,k), read by rows, given by (2, 1/2, -1/2, 0, 0, 0, 0, 0, 0, 0, ...) DELTA (2, -1/2, -1/2, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.

A210637

Triangle T(n,k), read by rows, given by (2, 1/2, -1/2, 0, 0, 0, 0, 0, 0, 0, ...) DELTA (2, -1/2, -1/2, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =5a(4) =8a(5) =3a(6) =12a(7) =27a(8) =20a(9) =5a(10) =29a(11) =84a(12) =91a(13) =44a(14) =8a(15) =70a(16) =248a(17) =352a(18) =251a(19) =90a(20) =13a(21) =169a(22) =708a(23) =1240a(24) =1164a(25) =618a(26) =176a(27) =21a(28) =408a(29) =1973

External references