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), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
A149612
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), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =63a(5) =239a(6) =1029a(7) =4329a(8) =18875a(9) =83179a(10) =370817a(11) =1671025a(12) =7590621a(13) =34695117a(14) =159768149a(15) =738571111a(16) =3433727997a(17) =16020382559a(18) =75032012255a(19) =352609880571
External references
- oeis: A149612