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), (0, -1, 1), (0, 1, 1), (1, 0, 0)}.
A150006
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), (0, -1, 1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =60a(5) =221a(6) =842a(7) =3268a(8) =12943a(9) =52388a(10) =214155a(11) =884488a(12) =3686528a(13) =15470371a(14) =65441142a(15) =278518297a(16) =1191216971a(17) =5119104161a(18) =22089151177a(19) =95691982593a(20) =416093182339
External references
- oeis: A150006