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, 0, 0), (1, -1, 0), (1, 0, 0), (1, 1, 0), (1, 1, 1)}.
A151238
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, 0, 0), (1, -1, 0), (1, 0, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =63a(4) =302a(5) =1440a(6) =7020a(7) =34175a(8) =167978a(9) =825688a(10) =4078284a(11) =20152606a(12) =99849580a(13) =494979560a(14) =2457666200a(15) =12208697151a(16) =60709727410a(17) =302015454120
External references
- oeis: A151238