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, 1, -1), (1, -1, 0), (1, 1, 1)}.
A149122
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, 1, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =94a(6) =368a(7) =1131a(8) =4466a(9) =14468a(10) =57356a(11) =193200a(12) =767664a(13) =2650814a(14) =10552660a(15) =37141229a(16) =148040634a(17) =528844796a(18) =2109494072a(19) =7623040680a(20) =30426290940a(21) =110998813606a(22) =443245452212
External references
- oeis: A149122