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, 0), (0, -1, 1), (1, -1, 0), (1, 0, -1), (1, 1, 0)}.
A149334
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, 0), (0, -1, 1), (1, -1, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =40a(5) =145a(6) =543a(7) =2073a(8) =8121a(9) =32419a(10) =131221a(11) =537789a(12) =2227180a(13) =9308051a(14) =39212347a(15) =166345346a(16) =710026110a(17) =3047504428a(18) =13145873941a(19) =56963607057a(20) =247851047180
External references
- oeis: A149334