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, 0, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
A149368
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, 0, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =45a(5) =161a(6) =651a(7) =2575a(8) =10768a(9) =44901a(10) =193043a(11) =833057a(12) =3653939a(13) =16134813a(14) =71923457a(15) =322774583a(16) =1457954685a(17) =6622090289a(18) =30234131093a(19) =138642032594a(20) =638494794892
External references
- oeis: A149368