Internal digits of k^2 include digits of k as substring, k does not end in 0.

Terms

a(0) =3792a(1) =14651a(2) =495475a(3) =505025a(4) =971582a(5) =1713526a(6) =4115964a(7) =5133355a(8) =6933808a(9) =10050125a(10) =48588526a(11) =50050025a(12) =66952741a(13) =88027284a(14) =88819024a(15) =105124922a(16) =146509717a(17) =177656344a(18) =200500625a(19) =250050005a(20) =370156212a(21) =753348181a(22) =758872344a(23) =1000500125a(24) =3199268655a(25) =4005003125a(26) =4935640724a(27) =4999504975