Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.
A264545
Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.
Terms
- a(0) =1a(1) =6a(2) =16a(3) =45a(4) =133a(5) =400a(6) =1204a(7) =3561a(8) =10554a(9) =31493a(10) =93784a(11) =278862a(12) =829809a(13) =2469737a(14) =7349616a(15) =21870896a(16) =65083321a(17) =193678264a(18) =576359005a(19) =1715146434a(20) =5103989104a(21) =15188659597a(22) =45198999981a(23) =134504868528a(24) =400264674436
External references
- oeis: A264545