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), (0, 1, 0), (1, -1, -1)}.
A148030
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), (0, 1, 0), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =51a(7) =124a(8) =377a(9) =1022a(10) =3227a(11) =9549a(12) =30594a(13) =94752a(14) =308328a(15) =995440a(16) =3313435a(17) =11004039a(18) =37111768a(19) =125537597a(20) =430051506a(21) =1482855865a(22) =5154990100a(23) =17995511516a(24) =63180065010a(25) =223006649457a(26) =792069518708
External references
- oeis: A148030