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), (-1, 0, 1), (1, -1, -1), (1, 1, 1)}.
A149523
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), (-1, 0, 1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =51a(5) =159a(6) =715a(7) =2481a(8) =11325a(9) =41821a(10) =192007a(11) =737257a(12) =3411795a(13) =13471713a(14) =62670875a(15) =252326759a(16) =1179837765a(17) =4828186997a(18) =22652634461a(19) =93834192877a(20) =441735525933
External references
- oeis: A149523