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, 1, -1), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
A150133
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, 1, -1), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =72a(5) =267a(6) =1049a(7) =4153a(8) =16997a(9) =70218a(10) =295529a(11) =1253341a(12) =5382995a(13) =23255205a(14) =101325678a(15) =443839080a(16) =1955391369a(17) =8655508361a(18) =38477146051a(19) =171736388543a(20) =769090688549
External references
- oeis: A150133