T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to an odd number of horizontal and vertical neighbors.
A198477
T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element equal to an odd number of horizontal and vertical neighbors.
Terms
- a(0) =2a(1) =12a(2) =12a(3) =76a(4) =252a(5) =76a(6) =492a(7) =6104a(8) =6104a(9) =492a(10) =3212a(11) =153222a(12) =636636a(13) =153222a(14) =3212a(15) =21036a(16) =3935188a(17) =72691500a(18) =72691500a(19) =3935188a(20) =21036a(21) =137932a(22) =101884208a(23) =8603604942
External references
- oeis: A198477