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, -1), (-1, 0, 0), (-1, 1, 1), (1, 0, 0)}.
A148530
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, -1), (-1, 0, 0), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =39a(6) =165a(7) =377a(8) =1647a(9) =3995a(10) =17845a(11) =45121a(12) =205541a(13) =536249a(14) =2474831a(15) =6610581a(16) =30786211a(17) =83759135a(18) =393058457a(19) =1085568229a(20) =5126371793a(21) =14335810741a(22) =68037291303a(23) =192262747423a(24) =916299079747
External references
- oeis: A148530