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), (0, 0, 1), (1, 1, -1)}.
A148403
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), (0, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =50a(6) =166a(7) =592a(8) =2132a(9) =7747a(10) =29345a(11) =113657a(12) =439653a(13) =1731991a(14) =6959797a(15) =28044519a(16) =113767591a(17) =467788415a(18) =1936625448a(19) =8035496503a(20) =33615931265a(21) =141684937750a(22) =598464920684
External references
- oeis: A148403