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), (0, 0, 1), (0, 1, -1), (1, 0, -1), (1, 1, -1)}.
A149092
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), (0, 0, 1), (0, 1, -1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =31a(5) =87a(6) =323a(7) =1081a(8) =3973a(9) =14445a(10) =54212a(11) =204544a(12) =786923a(13) =3038695a(14) =11904138a(15) =46856916a(16) =185950943a(17) =742818757a(18) =2981832628a(19) =12038056472a(20) =48820715319a(21) =198765075087a(22) =812772546171
External references
- oeis: A149092