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), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
A150707
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), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =122a(5) =452a(6) =2198a(7) =8660a(8) =42684a(9) =174274a(10) =864582a(11) =3614176a(12) =17989054a(13) =76478894a(14) =381349152a(15) =1642113692a(16) =8196632434a(17) =35652099598a(18) =178068354530a(19) =780877012474
External references
- oeis: A150707