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, 0), (-1, 0, 0), (-1, 1, -1), (0, -1, 1), (1, 1, 0)}.
A149174
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, 0), (-1, 0, 0), (-1, 1, -1), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =34a(5) =118a(6) =411a(7) =1538a(8) =5769a(9) =22118a(10) =86604a(11) =340926a(12) =1363754a(13) =5487497a(14) =22284031a(15) =91060167a(16) =374275887a(17) =1546749984a(18) =6419406754a(19) =26758916234a(20) =111933134273a(21) =469802568778
External references
- oeis: A149174