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, 0), (-1, 1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150968
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, 0), (-1, 1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =155a(5) =711a(6) =3252a(7) =14987a(8) =71034a(9) =335301a(10) =1590682a(11) =7638914a(12) =36642619a(13) =176197696a(14) =853153680a(15) =4128974864a(16) =20015103523a(17) =97433641619a(18) =474259672053
External references
- oeis: A150968