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, 0, -1), (1, -1, -1), (1, 0, 1), (1, 1, 1)}.
A150677
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, 0, -1), (1, -1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =112a(5) =426a(6) =1866a(7) =7680a(8) =33944a(9) =145872a(10) =650470a(11) =2863580a(12) =12884626a(13) =57550120a(14) =261022367a(15) =1177534090a(16) =5375336582a(17) =24435718262a(18) =112113769620a(19) =512807778989
External references
- oeis: A150677