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, 0, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150830
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, 0, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =134a(5) =590a(6) =2650a(7) =12064a(8) =55662a(9) =259600a(10) =1218869a(11) =5758394a(12) =27355651a(13) =130518455a(14) =624952568a(15) =3002191966a(16) =14463270457a(17) =69845523330a(18) =338018136262
External references
- oeis: A150830