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, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150973
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, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =160a(5) =716a(6) =3314a(7) =15388a(8) =72499a(9) =342935a(10) =1635960a(11) =7824257a(12) =37611809a(13) =181209322a(14) =876049115a(15) =4242706707a(16) =20596344336a(17) =100135723710a(18) =487704113642
External references
- oeis: A150973