a(n) = sum of the squares of the coefficients of x^(2*k) in A(x^2)^{2*(n-2*k+1)}, as k varies from 0 to floor(n/2), with a(0)=1.
A182066
a(n) = sum of the squares of the coefficients of x^(2*k) in A(x^2)^{2*(n-2*k+1)}, as k varies from 0 to floor(n/2), with a(0)=1.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =158a(5) =741a(6) =4062a(7) =22193a(8) =223831a(9) =1335126a(10) =9060774a(11) =56864949a(12) =385073172a(13) =2564432294a(14) =16901547638a(15) =112676217841a(16) =937204012264
External references
- oeis: A182066