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, 0), (1, 0, 1)}.
A149031
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, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =33a(5) =127a(6) =486a(7) =1943a(8) =8052a(9) =33504a(10) =143203a(11) =618615a(12) =2696818a(13) =11919409a(14) =52965105a(15) =237386849a(16) =1071312485a(17) =4857376568a(18) =22160738643a(19) =101518175550a(20) =467022106982
External references
- oeis: A149031