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, -1), (0, -1, 0), (0, 1, 1), (1, 1, 0)}.
A150367
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, -1), (0, -1, 0), (0, 1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =94a(5) =357a(6) =1509a(7) =6175a(8) =26551a(9) =113299a(10) =494055a(11) =2162071a(12) =9545491a(13) =42425700a(14) =189365705a(15) =850294917a(16) =3830548728a(17) =17329346071a(18) =78654023782a(19) =357987459863
External references
- oeis: A150367