T(n,k)=Number of nXk 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
A277945
T(n,k)=Number of nXk 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =3a(5) =0a(6) =0a(7) =14a(8) =14a(9) =0a(10) =0a(11) =74a(12) =172a(13) =74a(14) =0a(15) =0a(16) =377a(17) =2353a(18) =2353a(19) =377a(20) =0a(21) =0a(22) =1932a(23) =31011a(24) =84970a(25) =31011a(26) =1932a(27) =0a(28) =0a(29) =9888
External references
- oeis: A277945