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, 0), (-1, 0, -1), (0, 1, 1), (1, 0, 0)}.
A149848
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, 0), (-1, 0, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =14a(4) =46a(5) =144a(6) =540a(7) =1924a(8) =6954a(9) =27006a(10) =100678a(11) =388228a(12) =1533052a(13) =5922870a(14) =23618486a(15) =94259276a(16) =374458076a(17) =1520059574a(18) =6128989460a(19) =24855713538a(20) =101883235332a(21) =415282905284
External references
- oeis: A149848