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, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
A149845
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, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =12a(4) =38a(5) =114a(6) =400a(7) =1449a(8) =5046a(9) =19172a(10) =74305a(11) =279604a(12) =1113750a(13) =4496546a(14) =17740654a(15) =72906831a(16) =302544900a(17) =1232387061a(18) =5177998210a(19) =21916697255a(20) =91351341100a(21) =390218601347
External references
- oeis: A149845