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), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
A150012
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), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =65a(5) =237a(6) =903a(7) =3626a(8) =14822a(9) =60668a(10) =252632a(11) =1066726a(12) =4542198a(13) =19459068a(14) =83952935a(15) =364404201a(16) =1590499390a(17) =6973481584a(18) =30691951800a(19) =135582966112a(20) =601142785215
External references
- oeis: A150012