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), (-1, 1, 1), (0, -1, 0), (1, 1, 0)}.
A149241
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), (-1, 1, 1), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =36a(5) =125a(6) =453a(7) =1615a(8) =6132a(9) =23315a(10) =89109a(11) =348805a(12) =1375922a(13) =5429329a(14) =21765534a(15) =87663419a(16) =353523880a(17) =1439753549a(18) =5886395981a(19) =24090905151a(20) =99280297840a(21) =410368064685
External references
- oeis: A149241