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, -1, 1), (-1, 1, -1), (0, 1, 0), (1, -1, 0)}.
A148047
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, -1, 1), (-1, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =58a(7) =129a(8) =466a(9) =1144a(10) =3828a(11) =10104a(12) =37281a(13) =101810a(14) =369043a(15) =1061567a(16) =3973614a(17) =11649570a(18) =44090410a(19) =133431028a(20) =508513935a(21) =1566776842a(22) =6059123603a(23) =19007334896a(24) =73793026201a(25) =235333880634a(26) =921738292786
External references
- oeis: A148047