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, 1), (-1, 0, 0), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
A149593
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, 1), (-1, 0, 0), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =57a(5) =219a(6) =923a(7) =3835a(8) =16373a(9) =71049a(10) =313877a(11) =1397021a(12) =6271765a(13) =28362947a(14) =129278243a(15) =592589149a(16) =2729588805a(17) =12626351945a(18) =58652928331a(19) =273500977443
External references
- oeis: A149593