T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally.
A232309
T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally.
Terms
- a(0) =1a(1) =3a(2) =3a(3) =7a(4) =37a(5) =7a(6) =15a(7) =257a(8) =257a(9) =15a(10) =33a(11) =1915a(12) =5149a(13) =1915a(14) =33a(15) =73a(16) =14223a(17) =107047a(18) =107047a(19) =14223a(20) =73a(21) =161a(22) =105411a(23) =2245709a(24) =6363511a(25) =2245709a(26) =105411a(27) =161a(28) =355a(29) =781873
External references
- oeis: A232309