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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
A149350
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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =42a(5) =156a(6) =593a(7) =2281a(8) =9007a(9) =35980a(10) =144820a(11) =588319a(12) =2409154a(13) =9915930a(14) =41011199a(15) =170436891a(16) =711045649a(17) =2975942110a(18) =12494155666a(19) =52604269433a(20) =222018315817a(21) =939132096649
External references
- oeis: A149350