a(n) is the number of squares <= 10^n that are not higher powers, i.e., terms of A076467.

A378168

a(n) is the number of squares <= 10^n that are not higher powers, i.e., terms of A076467.

Terms

    a(0) =2a(1) =6a(2) =24a(3) =87a(4) =292a(5) =959a(6) =3089a(7) =9875a(8) =31410a(9) =99633a(10) =315589a(11) =998889a(12) =3160340a(13) =9996605a(14) =31616816a(15) =99989509a(16) =316209268a(17) =999967330a(18) =3162219896a(19) =9999897769a(20) =31622595517a(21) =99999679010a(22) =316227196708a(23) =999998989804

External references