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, -1), (0, 1, 0), (0, 1, 1), (1, -1, 0)}.
A150039
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, -1), (0, 1, 0), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =17a(4) =65a(5) =229a(6) =908a(7) =3446a(8) =14423a(9) =57647a(10) =245981a(11) =1016795a(12) =4424472a(13) =18716285a(14) =82476997a(15) =355146413a(16) =1580936927a(17) =6900405318a(18) =30965367150a(19) =136621486303a(20) =617120493890
External references
- oeis: A150039