Triangle read by rows: row 1 is [1]; for n >= 1, row n gives coefficients of expansion of (-1 - x + x^2 + x^3)*(1 + x + x^2 + x^3)^(n-1) in order of increasing powers of x.
A349815
Triangle read by rows: row 1 is [1]; for n >= 1, row n gives coefficients of expansion of (-1 - x + x^2 + x^3)*(1 + x + x^2 + x^3)^(n-1) in order of increasing powers of x.
Terms
- a(0) =1a(1) =-1a(2) =-1a(3) =1a(4) =1a(5) =-1a(6) =-2a(7) =-1a(8) =0a(9) =1a(10) =2a(11) =1a(12) =-1a(13) =-3a(14) =-4a(15) =-4a(16) =-2a(17) =2a(18) =4a(19) =4a(20) =3a(21) =1a(22) =-1a(23) =-4a(24) =-8a(25) =-12a(26) =-13a(27) =-8a(28) =0a(29) =8
External references
- oeis: A349815