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), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
A151129
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), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =197a(5) =872a(6) =3983a(7) =18439a(8) =86108a(9) =405885a(10) =1926008a(11) =9180468a(12) =43971432a(13) =211334511a(14) =1018756854a(15) =4924594051a(16) =23857317607a(17) =115808367636a(18) =563173460823
External references
- oeis: A151129