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, 0), (-1, 0, -1), (0, 1, 1), (1, -1, -1), (1, -1, 1)}.
A148655
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, 0), (-1, 0, -1), (0, 1, 1), (1, -1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =24a(5) =64a(6) =234a(7) =773a(8) =2834a(9) =9831a(10) =36850a(11) =136350a(12) =513560a(13) =1943118a(14) =7518616a(15) =28941609a(16) =112624730a(17) =442163143a(18) =1745001882a(19) =6898346029a(20) =27491740152a(21) =109998293464a(22) =441017760936
External references
- oeis: A148655