a(n) = Sum_{k=0..n-1} (-1)^k*k^2*A000172(k).
A207320
a(n) = Sum_{k=0..n-1} (-1)^k*k^2*A000172(k).
Terms
- a(0) =0a(1) =0a(2) =-2a(3) =38a(4) =-466a(5) =5070a(6) =-51230a(7) =495394a(8) =-4647646a(9) =42658722a(10) =-385096770a(11) =3431429230a(12) =-30256897090a(13) =264500216510
External references
- oeis: A207320