T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.

A232368

T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =7a(4) =23a(5) =7a(6) =15a(7) =145a(8) =145a(9) =15a(10) =33a(11) =887a(12) =2411a(13) =887a(14) =33a(15) =73a(16) =5487a(17) =39321a(18) =39321a(19) =5487a(20) =73a(21) =161a(22) =33957a(23) =647287a(24) =1704619a(25) =647287a(26) =33957a(27) =161a(28) =355a(29) =210039

External references