Column 1 of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1 + x - x^2)^n.
A104506
Column 1 of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1 + x - x^2)^n.
Terms
- a(0) =0a(1) =-1a(2) =-2a(3) =0a(4) =8a(5) =15a(6) =-6a(7) =-77a(8) =-120a(9) =117a(10) =770a(11) =946a(12) =-1728a(13) =-7735a(14) =-6930a(15) =22800a(16) =76960a(17) =42245a(18) =-282150a(19) =-751640a(20) =-125800a(21) =3341205a(22) =7145710a(23) =-2002725a(24) =-38228232a(25) =-65418925a(26) =55550014a(27) =424605078a(28) =566938400a(29) =-936604097
External references
- oeis: A104506