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, -1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150877
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, -1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =147a(5) =676a(6) =3166a(7) =15053a(8) =72206a(9) =349108a(10) =1696935a(11) =8285899a(12) =40599296a(13) =199495622a(14) =982557165a(15) =4848579417a(16) =23964666699a(17) =118608352543a(18) =587706742771
External references
- oeis: A150877