A116499 Numbers k such that the base-10 representation of k^2 has the structure dmmd, where d is a single digit and m is a string of digits.

63565788, 777035126, 785900449264170834, 824735400720481514, 41969556121016094021, 7841042904081599033746826, 775474811976872476373043200886

Offset

1,1

Comments

a(8) and a(9) have 42 digits. a(8) = 403578381989727694739321538082071713672671.

Links

Table of n, a(n) for n=1..7.

Example

785900449264170834^2 = 6[17639516153625555][17639516153625555]6.

Crossrefs

Cf. A116500, A116501, A305719.

Sequence in context: A172683 A172777 A172844 * A217937 A203932 A223288

Adjacent sequences: A116496 A116497 A116498 * A116500 A116501 A116502

Keyword

base,nonn

Author

Giovanni Resta, Feb 18 2006

Status

approved