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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A151186
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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =51a(4) =228a(5) =1049a(6) =4912a(7) =23310a(8) =111611a(9) =538350a(10) =2611000a(11) =12719428a(12) =62181672a(13) =304871715a(14) =1498393712a(15) =7379275195a(16) =36403845579a(17) =179852166090a(18) =889676649510
External references
- oeis: A151186