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, 0), (0, -1, 0), (0, 0, -1), (1, 1, 1)}.
A149657
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, 0), (0, -1, 0), (0, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =59a(5) =239a(6) =977a(7) =3915a(8) =16303a(9) =69667a(10) =296063a(11) =1267901a(12) =5522509a(13) =24150555a(14) =105718063a(15) =466486197a(16) =2071291345a(17) =9210313171a(18) =41084031479a(19) =184159624765a(20) =827654854537
External references
- oeis: A149657