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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
A148156
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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =96a(7) =298a(8) =1028a(9) =3485a(10) =12724a(11) =45705a(12) =173541a(13) =650298a(14) =2544692a(15) =9844616a(16) =39436571a(17) =156427321a(18) =638580481a(19) =2584305014a(20) =10714655777a(21) =44081695845a(22) =185148725201a(23) =772276053413
External references
- oeis: A148156