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, 0, 0), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A150536
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, 0, 0), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =102a(5) =420a(6) =1762a(7) =7546a(8) =32776a(9) =143740a(10) =636509a(11) =2837470a(12) =12723564a(13) =57356783a(14) =259622346a(15) =1179671953a(16) =5378030204a(17) =24587733520a(18) =112709464907a(19) =517854785497
External references
- oeis: A150536