T(n,k)=Number of lower triangles of an n X n 0..k array with new values introduced in row major order 0..k and no two horizontal or vertical neighbors of any element equal.
A194893
T(n,k)=Number of lower triangles of an n X n 0..k array with new values introduced in row major order 0..k and no two horizontal or vertical neighbors of any element equal.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =0a(6) =1a(7) =3a(8) =6a(9) =0a(10) =1a(11) =3a(12) =24a(13) =0a(14) =0a(15) =1a(16) =3a(17) =33a(18) =192a(19) =0a(20) =0a(21) =1a(22) =3a(23) =34a(24) =1620a(25) =1152a(26) =0a(27) =0a(28) =1a(29) =3
External references
- oeis: A194893