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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A150155
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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =74a(5) =291a(6) =1195a(7) =5068a(8) =22018a(9) =97498a(10) =438339a(11) =1995159a(12) =9173968a(13) =42541779a(14) =198690351a(15) =933641950a(16) =4410158539a(17) =20926372152a(18) =99689221688a(19) =476548879546
External references
- oeis: A150155