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, 1, 0), (1, 0, 0), (1, 1, 1)}.
A150903
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, 1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =29a(4) =137a(5) =504a(6) =2437a(7) =9552a(8) =46795a(9) =190432a(10) =939661a(11) =3920239a(12) =19422969a(13) =82481518a(14) =409697827a(15) =1763172523a(16) =8773074029a(17) =38151730972a(18) =190064027439a(19) =833520544825
External references
- oeis: A150903