T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum.

A185614

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum.

Terms

    a(0) =0a(1) =171a(2) =171a(3) =361a(4) =2121a(5) =361a(6) =3645a(7) =24993a(8) =24993a(9) =3645a(10) =13365a(11) =313105a(12) =554305a(13) =313105a(14) =13365a(15) =94905a(16) =3959747a(17) =16830089a(18) =16830089a(19) =3959747a(20) =94905a(21) =424845a(22) =50512903a(23) =455401149a(24) =1099131565a(25) =455401149a(26) =50512903a(27) =424845a(28) =2682129a(29) =646053371

External references