Square root of concatenation(A090566(n), A090566(n+1)).

A264775

Square root of concatenation(A090566(n), A090566(n+1)).

Terms

    a(0) =4a(1) =25a(2) =159a(3) =531a(4) =3101a(5) =24903a(6) =243740a(7) =433129a(8) =2703038a(9) =21046245a(10) =53478992a(11) =292123372a(12) =2164833445a(13) =21425610902a(14) =48888908358a(15) =192151648872a(16) =477890021223

External references