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, 1), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
A148759
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, 1), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =29a(5) =78a(6) =338a(7) =1058a(8) =4686a(9) =15803a(10) =71729a(11) =253562a(12) =1169404a(13) =4288926a(14) =19974730a(15) =75412117a(16) =353859401a(17) =1366111116a(18) =6451741800a(19) =25355370298a(20) =120372620960a(21) =480181343782
External references
- oeis: A148759