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), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
A148387
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), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =51a(6) =169a(7) =580a(8) =2097a(9) =7714a(10) =28843a(11) =110016a(12) =426442a(13) =1670664a(14) =6607389a(15) =26445339a(16) =106744587a(17) =433688136a(18) =1773688338a(19) =7306501045a(20) =30264788185a(21) =125931363266a(22) =526553987611
External references
- oeis: A148387