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, 0, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
A148191
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, 0, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =31a(6) =91a(7) =288a(8) =940a(9) =3099a(10) =10607a(11) =37862a(12) =134767a(13) =490159a(14) =1826803a(15) =6870465a(16) =26029551a(17) =100186211a(18) =390244176a(19) =1525584938a(20) =6022917327a(21) =24022355598a(22) =96252798082a(23) =387763662137
External references
- oeis: A148191