Triangle, read by rows, each row n being defined by g.f. Product_{k=1..n} (k + x - k*x^2), for n >= 0.
A322225
Triangle, read by rows, each row n being defined by g.f. Product_{k=1..n} (k + x - k*x^2), for n >= 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =-1a(4) =2a(5) =3a(6) =-3a(7) =-3a(8) =2a(9) =6a(10) =11a(11) =-12a(12) =-21a(13) =12a(14) =11a(15) =-6a(16) =24a(17) =50a(18) =-61a(19) =-140a(20) =75a(21) =140a(22) =-61a(23) =-50a(24) =24a(25) =120a(26) =274a(27) =-375a(28) =-1011a(29) =540
External references
- oeis: A322225