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, 1), (1, 1, -1), (1, 1, 1)}.
A149650
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, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =71a(5) =277a(6) =1305a(7) =5551a(8) =26459a(9) =117339a(10) =564175a(11) =2569541a(12) =12423757a(13) =57631629a(14) =279785441a(15) =1314805215a(16) =6403579035a(17) =30380380575a(18) =148347638871a(19) =708946177403
External references
- oeis: A149650