T(n,k)=4-level binary fanout graph coloring a rectangular array: number of nXk 0..14 arrays where 0..14 label nodes of a graph with edges 0,1 1,3 3,5 3,6 1,4 4,7 4,8 0,2 2,9 9,11 9,12 2,10 10,13 10,14 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.
A223449
T(n,k)=4-level binary fanout graph coloring a rectangular array: number of nXk 0..14 arrays where 0..14 label nodes of a graph with edges 0,1 1,3 3,5 3,6 1,4 4,7 4,8 0,2 2,9 9,11 9,12 2,10 10,13 10,14 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.
Terms
- a(0) =15a(1) =28a(2) =28a(3) =66a(4) =104a(5) =66a(6) =144a(7) =408a(8) =408a(9) =144a(10) =336a(11) =1616a(12) =2988a(13) =1616a(14) =336a(15) =752a(16) =6432a(17) =20640a(18) =20640a(19) =6432a(20) =752a(21) =1752a(22) =25664a(23) =149120a(24) =262368a(25) =149120a(26) =25664a(27) =1752a(28) =3936a(29) =102528
External references
- oeis: A223449