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), (0, 0, 1), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
A150212
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), (0, 0, 1), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =81a(5) =331a(6) =1405a(7) =6134a(8) =27331a(9) =123742a(10) =567304a(11) =2627172a(12) =12267169a(13) =57671808a(14) =272693750a(15) =1295686844a(16) =6182107658a(17) =29603230521a(18) =142201981662a(19) =684965998290
External references
- oeis: A150212