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, 1), (-1, 1, 0), (1, -1, -1), (1, 1, 0)}.
A149109
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, 1), (-1, 1, 0), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =35a(5) =98a(6) =437a(7) =1390a(8) =6414a(9) =22044a(10) =103172a(11) =374503a(12) =1774645a(13) =6683511a(14) =31944939a(15) =123925869a(16) =595885731a(17) =2363708500a(18) =11425995739a(19) =46163399205a(20) =223969482276a(21) =918579161523
External references
- oeis: A149109