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), (-1, 1, 0), (0, -1, 1), (1, 0, 0)}.
A148559
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), (-1, 1, 0), (0, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =18a(5) =47a(6) =151a(7) =460a(8) =1525a(9) =5038a(10) =17053a(11) =58515a(12) =203966a(13) =721558a(14) =2574957a(15) =9302325a(16) =33775642a(17) =123614239a(18) =455228563a(19) =1688097815a(20) =6293391801a(21) =23589993847a(22) =88808957276a(23) =335602754282
External references
- oeis: A148559