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, -1, 1), (-1, 1, -1), (1, 0, -1), (1, 0, 1)}.
A148547
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, -1, 1), (-1, 1, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =51a(6) =179a(7) =537a(8) =2047a(9) =6877a(10) =26069a(11) =89565a(12) =357789a(13) =1308757a(14) =5195025a(15) =19133803a(16) =78842569a(17) =301895385a(18) =1236230249a(19) =4740891949a(20) =19969111093a(21) =78741281045a(22) =329548045841
External references
- oeis: A148547