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), (0, 1, -1), (1, 0, 1)}.
A150073
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), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =65a(5) =240a(6) =918a(7) =3609a(8) =14571a(9) =59624a(10) =247322a(11) =1038351a(12) =4401989a(13) =18803632a(14) =80903679a(15) =350281242a(16) =1524630402a(17) =6667663326a(18) =29286656081a(19) =129132109006a(20) =571345532548
External references
- oeis: A150073