T(n,k) is the number of n X k (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X (k+1) binary array.
A226852
T(n,k) is the number of n X k (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X (k+1) binary array.
Terms
- a(0) =3a(1) =9a(2) =9a(3) =23a(4) =71a(5) =23a(6) =57a(7) =417a(8) =417a(9) =57a(10) =145a(11) =2291a(12) =4722a(13) =2291a(14) =145a(15) =373a(16) =12961a(17) =49481a(18) =49481a(19) =12961a(20) =373a(21) =957a(22) =75111a(23) =541932a(24) =989731a(25) =541932a(26) =75111a(27) =957a(28) =2449a(29) =435829
External references
- oeis: A226852