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, 0, 1)}.
A150343
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, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =90a(5) =342a(6) =1419a(7) =5747a(8) =24650a(9) =103937a(10) =454972a(11) =1965927a(12) =8731818a(13) =38410970a(14) =172386658a(15) =767905109a(16) =3474517190a(17) =15631384733a(18) =71175064831a(19) =322632050843
External references
- oeis: A150343