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, 1), (1, -1, 1), (1, 1, 0)}.
A149229
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, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =46a(5) =146a(6) =700a(7) =2492a(8) =12157a(9) =46188a(10) =227311a(11) =900226a(12) =4452740a(13) =18148307a(14) =90047902a(15) =374826004a(16) =1863659513a(17) =7883484889a(18) =39253107698a(19) =168170902251a(20) =838196417310
External references
- oeis: A149229