T(n,k)=Number of -k..k arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.
A200553
T(n,k)=Number of -k..k arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.
Terms
- a(0) =4a(1) =14a(2) =14a(3) =30a(4) =76a(5) =26a(6) =52a(7) =200a(8) =280a(9) =72a(10) =80a(11) =446a(12) =1184a(13) =1240a(14) =142a(15) =114a(16) =836a(17) =3396a(18) =7254a(19) =4978a(20) =362a(21) =154a(22) =1368a(23) =7778a(24) =26850a(25) =43698a(26) =21626a(27) =778a(28) =200a(29) =2134
External references
- oeis: A200553