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, 0, 0), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A148936
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, 0, 0), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =28a(5) =102a(6) =372a(7) =1392a(8) =5490a(9) =21848a(10) =88322a(11) =364457a(12) =1519209a(13) =6394726a(14) =27196992a(15) =116596476a(16) =503240096a(17) =2185814374a(18) =9549807525a(19) =41930059192a(20) =184918480762a(21) =819029864816
External references
- oeis: A148936