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, -1), (-1, 1, 1), (0, 1, 1), (1, 0, 0)}.
A149996
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, -1), (-1, 1, 1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =59a(5) =214a(6) =803a(7) =3112a(8) =12175a(9) =48204a(10) =193547a(11) =783625a(12) =3192053a(13) =13089520a(14) =54000289a(15) =223719067a(16) =930532505a(17) =3885596256a(18) =16278334661a(19) =68386305015a(20) =288067637489
External references
- oeis: A149996