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, 1), (0, 0, 1), (1, 0, 0), (1, 0, 1)}.
A151087
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, 1), (0, 0, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =41a(4) =165a(5) =687a(6) =2951a(7) =12861a(8) =56937a(9) =255227a(10) =1156995a(11) =5287185a(12) =24325901a(13) =112587815a(14) =523956543a(15) =2449799269a(16) =11500087377a(17) =54174459251a(18) =256027253243
External references
- oeis: A151087