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, 0, 1), (1, -1, -1), (1, 1, 1)}.
A150357
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, 0, 1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =91a(5) =350a(6) =1455a(7) =6026a(8) =25831a(9) =110734a(10) =482689a(11) =2114261a(12) =9350007a(13) =41571064a(14) =186033073a(15) =836137599a(16) =3773447331a(17) =17088490056a(18) =77646603491a(19) =353859775595
External references
- oeis: A150357