a(n) = n 4's sandwiched between two 1's.
A205084
a(n) = n 4's sandwiched between two 1's.
Terms
- a(0) =11a(1) =141a(2) =1441a(3) =14441a(4) =144441a(5) =1444441a(6) =14444441a(7) =144444441a(8) =1444444441a(9) =14444444441a(10) =144444444441
External references
- oeis: A205084