Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 0, 1), (1, -1, 1), (1, 1, 0)}.
A149141
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 0, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =36a(5) =112a(6) =444a(7) =1547a(8) =6307a(9) =22910a(10) =95780a(11) =357505a(12) =1516176a(13) =5792384a(14) =24759719a(15) =96447614a(16) =414381271a(17) =1639048308a(18) =7071067205a(19) =28301323345a(20) =122534510477a(21) =495035478897
External references
- oeis: A149141