T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 1,-2 or 2,-1.

A264128

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 1,-2 or 2,-1.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =9a(5) =4a(6) =8a(7) =45a(8) =45a(9) =8a(10) =16a(11) =200a(12) =576a(13) =200a(14) =16a(15) =32a(16) =845a(17) =5733a(18) =5733a(19) =845a(20) =32a(21) =64a(22) =3549a(23) =53361a(24) =108045a(25) =53361a(26) =3549a(27) =64a(28) =128a(29) =14994

External references