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, 0), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A149038
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, 0), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =35a(5) =135a(6) =541a(7) =2217a(8) =9377a(9) =40349a(10) =175942a(11) =778143a(12) =3477104a(13) =15671149a(14) =71188693a(15) =325532865a(16) =1497282449a(17) =6922353003a(18) =32148253707a(19) =149919105537a(20) =701702507444
External references
- oeis: A149038