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, 0), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150288
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, 0), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =92a(5) =382a(6) =1617a(7) =7041a(8) =31302a(9) =140875a(10) =639710a(11) =2928650a(12) =13519106a(13) =62819420a(14) =293392731a(15) =1376112419a(16) =6480610420a(17) =30633985898a(18) =145272764685a(19) =690803770276
External references
- oeis: A150288