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), (0, 0, -1), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150048
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), (0, 0, -1), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =61a(5) =210a(6) =775a(7) =2880a(8) =11167a(9) =43450a(10) =174162a(11) =699434a(12) =2871416a(13) =11799186a(14) =49318291a(15) =206225105a(16) =874196472a(17) =3706064495a(18) =15889015969a(19) =68112992527a(20) =294754698073
External references
- oeis: A150048