Number of (3+1) X (n+1) arrays of permutations of 0..n*4+3 with each element having directed index change -2,-2 -1,0 0,1 or 1,0.

A264536

Number of (3+1) X (n+1) arrays of permutations of 0..n*4+3 with each element having directed index change -2,-2 -1,0 0,1 or 1,0.

Terms

    a(0) =1a(1) =4a(2) =13a(3) =29a(4) =89a(5) =261a(6) =673a(7) =1949a(8) =5545a(9) =15045a(10) =42609a(11) =119917a(12) =331641a(13) =931669a(14) =2611393a(15) =7272829a(16) =20371529a(17) =57014501a(18) =159195153a(19) =445435789a(20) =1245975065a(21) =3482261365a(22) =9739722849a(23) =27238546077a(24) =76152655081a(25) =212964930309a(26) =595543665073

External references