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, 1, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.
A150321
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, 1, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =93a(5) =334a(6) =1545a(7) =5904a(8) =28361a(9) =113885a(10) =551115a(11) =2267035a(12) =11116928a(13) =46792329a(14) =229966829a(15) =980712270a(16) =4849282854a(17) =20956092385a(18) =103706253002a(19) =451920681361
External references
- oeis: A150321