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, 1), (0, 0, 1), (1, -1, 0), (1, 1, 0)}.
A150233
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, 1), (0, 0, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =82a(5) =325a(6) =1333a(7) =5544a(8) =23623a(9) =101702a(10) =442102a(11) =1943860a(12) =8596023a(13) =38264599a(14) =171359276a(15) =770542923a(16) =3480459008a(17) =15778420195a(18) =71751938260a(19) =327315216072
External references
- oeis: A150233