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, 0, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 1)}.
A149195
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, 0, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =38a(5) =127a(6) =494a(7) =1804a(8) =7250a(9) =27768a(10) =113603a(11) =448933a(12) =1858458a(13) =7499923a(14) =31317733a(15) =128292015a(16) =539273259a(17) =2233843666a(18) =9439572100a(19) =39437413808a(20) =167371595700a(21) =703994615004
External references
- oeis: A149195