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, 0), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
A150238
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, 0), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =83a(5) =324a(6) =1316a(7) =5472a(8) =23111a(9) =98972a(10) =428786a(11) =1875110a(12) =8264009a(13) =36664072a(14) =163605215a(15) =733730362a(16) =3305098457a(17) =14945924693a(18) =67821906606a(19) =308723676681
External references
- oeis: A150238