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, 0, 1), (0, -1, 1), (1, 1, 0), (1, 1, 1)}.
A150926
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, 0, 1), (0, -1, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =149a(5) =648a(6) =2931a(7) =13488a(8) =62167a(9) =291298a(10) =1367763a(11) =6467739a(12) =30736035a(13) =146469342a(14) =701078493a(15) =3362890039a(16) =16177430953a(17) =77988765648a(18) =376700018561
External references
- oeis: A150926