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, 1, 0), (0, 0, 1), (0, 1, 0), (1, 0, -1)}.
A149894
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, 1, 0), (0, 0, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =45a(5) =155a(6) =558a(7) =2080a(8) =7981a(9) =31333a(10) =125347a(11) =509443a(12) =2097949a(13) =8739652a(14) =36773651a(15) =156084172a(16) =667620841a(17) =2875253212a(18) =12459142364a(19) =54287523254a(20) =237728626706
External references
- oeis: A149894