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), (1, -1, 0), (1, 1, 1)}.
A149565
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), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =59a(5) =197a(6) =921a(7) =3331a(8) =15865a(9) =60727a(10) =290267a(11) =1154275a(12) =5560547a(13) =22622223a(14) =109636859a(15) =454582257a(16) =2209362255a(17) =9300526153a(18) =45349547541a(19) =193067942897a(20) =943931822673
External references
- oeis: A149565