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, 0), (0, 0, 1), (1, 1, 0)}.
A150228
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, 0), (0, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =78a(5) =298a(6) =1196a(7) =4776a(8) =19630a(9) =82460a(10) =346174a(11) =1475372a(12) =6366272a(13) =27477314a(14) =119705140a(15) =525695678a(16) =2309607508a(17) =10211810684a(18) =45406121298a(19) =201982264656a(20) =902651784780
External references
- oeis: A150228