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, 0), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.
A150032
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, 0), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =64a(5) =216a(6) =856a(7) =2976a(8) =12832a(9) =48448a(10) =205888a(11) =782464a(12) =3480192a(13) =13840256a(14) =60745088a(15) =241676800a(16) =1093548544a(17) =4483687424a(18) =20050686976a(19) =82059288576a(20) =375415300096
External references
- oeis: A150032