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, 1, 1), (1, 0, 1), (1, 1, 0)}.
A151155
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, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =209a(5) =941a(6) =4347a(7) =20261a(8) =95365a(9) =452305a(10) =2155329a(11) =10320265a(12) =49598867a(13) =239074823a(14) =1155565957a(15) =5597549769a(16) =27168843921a(17) =132100021399a(18) =643261343577
External references
- oeis: A151155