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, 0), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
A150323
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, 0), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =22a(4) =85a(5) =318a(6) =1299a(7) =5314a(8) =22529a(9) =96725a(10) =421901a(11) =1863765a(12) =8310445a(13) =37413953a(14) =169629100a(15) =774401491a(16) =3555492965a(17) =16408964049a(18) =76075826209a(19) =354152959713
External references
- oeis: A150323