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, 0, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150820
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, 0, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =141a(5) =610a(6) =2860a(7) =12992a(8) =61918a(9) =288651a(10) =1388824a(11) =6576019a(12) =31836080a(13) =152292256a(14) =740484620a(15) =3567625444a(16) =17402537091a(17) =84284773469a(18) =412155668864
External references
- oeis: A150820