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, -1, 0), (0, 1, 0), (0, 1, 1), (1, 0, 0)}.
A151039
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, -1, 0), (0, 1, 0), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =33a(4) =129a(5) =501a(6) =2062a(7) =8683a(8) =36371a(9) =156786a(10) =683812a(11) =2970272a(12) =13128686a(13) =58445192a(14) =259361838a(15) =1164616878a(16) =5254843629a(17) =23651403474a(18) =107365109937a(19) =489088828144
External references
- oeis: A151039