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), (1, -1, -1), (1, 1, 0), (1, 1, 1)}.
A150907
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), (1, -1, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =143a(5) =583a(6) =2713a(7) =11860a(8) =55812a(9) =252530a(10) =1199827a(11) =5542569a(12) =26520918a(13) =124245262a(14) =597677638a(15) =2828300456a(16) =13662236236a(17) =65139403991a(18) =315712785838
External references
- oeis: A150907