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, 1, 1), (0, 0, -1), (0, 1, 0), (1, -1, 1)}.
A148411
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, 1, 1), (0, 0, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =57a(6) =194a(7) =692a(8) =2597a(9) =9965a(10) =38887a(11) =153446a(12) =616302a(13) =2509496a(14) =10324475a(15) =42790492a(16) =178745272a(17) =752653009a(18) =3190734528a(19) =13601112147a(20) =58251672134a(21) =250707438567
External references
- oeis: A148411