Triangle, read by rows, given by [0,1/3,-1/3,0,0,0,0,0,0,0,...] DELTA [3,-1/3,1/3,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.
A172249
Triangle, read by rows, given by [0,1/3,-1/3,0,0,0,0,0,0,0,...] DELTA [3,-1/3,1/3,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.
Terms
- a(0) =1a(1) =0a(2) =3a(3) =0a(4) =1a(5) =8a(6) =0a(7) =0a(8) =6a(9) =21a(10) =0a(11) =0a(12) =1a(13) =25a(14) =55a(15) =0a(16) =0a(17) =0a(18) =9a(19) =90a(20) =144a(21) =0a(22) =0a(23) =0a(24) =1a(25) =51a(26) =300a(27) =377a(28) =0a(29) =0
External references
- oeis: A172249