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, -1, -1), (1, 0, -1)}.
A148879
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, -1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =95a(6) =385a(7) =1401a(8) =5815a(9) =22659a(10) =96885a(11) =392671a(12) =1710249a(13) =7147647a(14) =31498799a(15) =134580859a(16) =598984123a(17) =2600652988a(18) =11666192756a(19) =51299141640a(20) =231548223922
External references
- oeis: A148879