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, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A150895
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, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =34a(4) =155a(5) =720a(6) =3415a(7) =16388a(8) =79376a(9) =386810a(10) =1893990a(11) =9307399a(12) =45868921a(13) =226559511a(14) =1121063963a(15) =5555392199a(16) =27562783292a(17) =136888378457a(18) =680415457856
External references
- oeis: A150895