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), (1, 0, -1), (1, 0, 0), (1, 0, 1)}.
A150061
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), (1, 0, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =63a(5) =223a(6) =834a(7) =3148a(8) =12367a(9) =48934a(10) =197925a(11) =804649a(12) =3330805a(13) =13848573a(14) =58252383a(15) =245904825a(16) =1048408230a(17) =4484218101a(18) =19315264726a(19) =83426739187a(20) =362556895362
External references
- oeis: A150061