Coefficient [x^n] of the Maclaurin series for 2 - sqrt(1 - 4*x - 4*x^2).
A179190
Coefficient [x^n] of the Maclaurin series for 2 - sqrt(1 - 4*x - 4*x^2).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =24a(5) =80a(6) =288a(7) =1088a(8) =4256a(9) =17088a(10) =70016a(11) =291584a(12) =1230592a(13) =5251584a(14) =22623232a(15) =98248704a(16) =429677056a(17) =1890700288a(18) =8364824576a(19) =37186449408a(20) =166030266368a(21) =744180244480
External references
- oeis: A179190