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, 0, 1), (-1, 1, 0), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149799
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, 0, 1), (-1, 1, 0), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =87a(5) =363a(6) =1719a(7) =7625a(8) =36805a(9) =169109a(10) =824893a(11) =3874641a(12) =19020537a(13) =90656173a(14) =446915921a(15) =2151851691a(16) =10640076983a(17) =51609398595a(18) =255754672359
External references
- oeis: A149799