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, 1, -1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A150910
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, 1, -1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =145a(5) =587a(6) =2791a(7) =12106a(8) =58124a(9) =261744a(10) =1264717a(11) =5828785a(12) =28292206a(13) =132437321a(14) =645033524a(15) =3053061983a(16) =14909656701a(17) =71152742334a(18) =348223759551
External references
- oeis: A150910