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, 1), (-1, 0, 1), (0, 1, 0), (1, 1, 0)}.
A150056
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, 1), (-1, 0, 1), (0, 1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =62a(5) =220a(6) =816a(7) =3066a(8) =11770a(9) =45840a(10) =181100a(11) =722238a(12) =2904590a(13) =11764740a(14) =47972960a(15) =196737634a(16) =810804722a(17) =3355892888a(18) =13944611892a(19) =58151327382a(20) =243285478982
External references
- oeis: A150056