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, 0, 1), (1, -1, 1), (1, 1, 0)}.
A150244
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, 0, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =84a(5) =334a(6) =1374a(7) =5778a(8) =24688a(9) =106577a(10) =465490a(11) =2050238a(12) =9083750a(13) =40512563a(14) =181633610a(15) =817664224a(16) =3696090185a(17) =16767288215a(18) =76293756214a(19) =348129688283
External references
- oeis: A150244