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, 1), (1, -1, 0), (1, 1, 0)}.
A149169
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, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =42a(5) =130a(6) =610a(7) =2095a(8) =10150a(9) =37696a(10) =182974a(11) =707948a(12) =3478480a(13) =13945828a(14) =68567200a(15) =280881929a(16) =1389304994a(17) =5806737116a(18) =28728911784a(19) =121676284776a(20) =604030685918
External references
- oeis: A149169