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, 0, 1), (0, 1, 1), (1, 1, -1)}.
A150169
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, 0, 1), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =76a(5) =288a(6) =1168a(7) =4752a(8) =20016a(9) =84640a(10) =365408a(11) =1583296a(12) =6952768a(13) =30634624a(14) =136213376a(15) =607505408a(16) =2727042560a(17) =12274841088a(18) =55516137984a(19) =251692338176
External references
- oeis: A150169