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, 0), (1, 0, 0), (1, 1, 1)}.
A151145
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, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =205a(5) =915a(6) =4197a(7) =19445a(8) =90887a(9) =429091a(10) =2036615a(11) =9711097a(12) =46538103a(13) =223736955a(14) =1078659981a(15) =5215774821a(16) =25273555029a(17) =122695169497a(18) =596801074495
External references
- oeis: A151145