Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and nonzero first and second differences.
A200449
Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and nonzero first and second differences.
Terms
- a(0) =26a(1) =142a(2) =728a(3) =3788a(4) =19802a(5) =103726a(6) =548204a(7) =2916664a(8) =15576706a(9) =83481240a(10) =448758338a(11) =2418733790a(12) =13066215896a(13) =70726653732a(14) =383520053994
External references
- oeis: A200449