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), (0, 0, -1), (0, 1, -1), (1, 0, -1), (1, 1, 0)}.
A148439
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), (0, 0, -1), (0, 1, -1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =15a(5) =43a(6) =143a(7) =447a(8) =1457a(9) =5153a(10) =17712a(11) =62226a(12) =228307a(13) =826403a(14) =3045356a(15) =11463886a(16) =42915761a(17) =163162575a(18) =626421084a(19) =2403106726a(20) =9332107293a(21) =36397643689a(22) =142264226087a(23) =560927157537
External references
- oeis: A148439