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, -1, 0), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}.
A149562
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, -1, 0), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =59a(5) =197a(6) =899a(7) =3309a(8) =15477a(9) =59713a(10) =284057a(11) =1132297a(12) =5429661a(13) =22193239a(14) =106957103a(15) =445369365a(16) =2156332451a(17) =9104878879a(18) =44258847303a(19) =188981432661a(20) =921420662873
External references
- oeis: A149562