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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150930
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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =151a(5) =647a(6) =3018a(7) =13621a(8) =64646a(9) =299168a(10) =1435690a(11) =6751801a(12) =32625433a(13) =155167697a(14) =753314009a(15) =3611917443a(16) =17596490710a(17) =84876974607a(18) =414630697985
External references
- oeis: A150930