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, -1, 1), (1, 1, 0)}.
A149224
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, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =44a(5) =150a(6) =661a(7) =2591a(8) =11541a(9) =48443a(10) =219710a(11) =956105a(12) =4411606a(13) =19644676a(14) =91797778a(15) =415976400a(16) =1960755775a(17) =9009548272a(18) =42741998435a(19) =198551589284a(20) =946944361740
External references
- oeis: A149224