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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150976
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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =168a(5) =737a(6) =3582a(7) =16548a(8) =81032a(9) =382762a(10) =1890435a(11) =9071907a(12) =44923827a(13) =217534842a(14) =1080563215a(15) =5269297335a(16) =26206186223a(17) =128382787217a(18) =639395569356
External references
- oeis: A150976