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, 0), (1, -1, -1), (1, 1, 1)}.
A150515
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, 0), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =426a(6) =1833a(7) =7964a(8) =35385a(9) =158940a(10) =722285a(11) =3303959a(12) =15221117a(13) =70538082a(14) =328742995a(15) =1538921057a(16) =7231316923a(17) =34092688644a(18) =161247150587a(19) =764872357279
External references
- oeis: A150515