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, 0), (-1, 0, 1), (1, 0, 1), (1, 1, -1)}.
A149296
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, 0), (-1, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =153a(6) =677a(7) =2455a(8) =11106a(9) =42895a(10) =198457a(11) =791305a(12) =3702406a(13) =15165773a(14) =71734282a(15) =299266047a(16) =1425366120a(17) =6033876043a(18) =28912348233a(19) =123853219579a(20) =596225571156
External references
- oeis: A149296