T(n,k)=1/6 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.

A184477

T(n,k)=1/6 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.

Terms

    a(0) =315a(1) =1095a(2) =1095a(3) =3705a(4) =2755a(5) =3705a(6) =12339a(7) =7085a(8) =7085a(9) =12339a(10) =45585a(11) =19119a(12) =14119a(13) =19119a(14) =45585a(15) =161739a(16) =62213a(17) =30681a(18) =30681a(19) =62213a(20) =161739a(21) =559305a(22) =200215a(23) =86575a(24) =53739a(25) =86575a(26) =200215a(27) =559305a(28) =2147931a(29) =645837

External references