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, 1), (-1, 1, 1), (0, 0, -1), (1, 0, 1)}.
A149249
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, 1), (-1, 1, 1), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =38a(5) =127a(6) =469a(7) =1705a(8) =6406a(9) =24361a(10) =94379a(11) =367885a(12) =1448670a(13) =5757657a(14) =23036942a(15) =92690393a(16) =375046694a(17) =1525796861a(18) =6232717793a(19) =25559071943a(20) =105212294444a(21) =434576923263
External references
- oeis: A149249