T(n,k) = number of n X k 0..3 arrays with entries increasing mod 4 by 0, 1 or 2 rightwards and downwards, starting with upper left zero.
A222444
T(n,k) = number of n X k 0..3 arrays with entries increasing mod 4 by 0, 1 or 2 rightwards and downwards, starting with upper left zero.
Terms
- a(0) =1a(1) =3a(2) =3a(3) =9a(4) =21a(5) =9a(6) =27a(7) =147a(8) =147a(9) =27a(10) =81a(11) =1029a(12) =2403a(13) =1029a(14) =81a(15) =243a(16) =7203a(17) =39285a(18) =39285a(19) =7203a(20) =243a(21) =729a(22) =50421a(23) =642249a(24) =1500183a(25) =642249a(26) =50421a(27) =729a(28) =2187a(29) =352947
External references
- oeis: A222444