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), (-1, 0, 1), (1, -1, 0), (1, 1, 0)}.
A149549
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), (-1, 0, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =57a(5) =185a(6) =837a(7) =2937a(8) =13469a(9) =50053a(10) =231217a(11) =890229a(12) =4139401a(13) =16354421a(14) =76393849a(15) =307792285a(16) =1443118481a(17) =5903933641a(18) =27765120645a(19) =115004559193a(20) =542206182909
External references
- oeis: A149549