Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.
A264373
Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.
Terms
- a(0) =2a(1) =1a(2) =13a(3) =25a(4) =128a(5) =347a(6) =1343a(7) =4172a(8) =14711a(9) =48187a(10) =164644a(11) =549209a(12) =1857120a(13) =6231551a(14) =21001218a(15) =70602740a(16) =237686843a(17) =799548823a(18) =2690789595a(19) =9053237740a(20) =30464275277a(21) =102504319825a(22) =344916282634
External references
- oeis: A264373