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, 0), (-1, 1, 0), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.
A150092
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, 0), (-1, 1, 0), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =66a(5) =245a(6) =948a(7) =3791a(8) =15476a(9) =64402a(10) =272700a(11) =1171314a(12) =5090997a(13) =22334327a(14) =98802899a(15) =440488059a(16) =1977476043a(17) =8931332628a(18) =40548362135a(19) =184956945997a(20) =847373416171
External references
- oeis: A150092