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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. 3
63565788, 777035126, 785900449264170834, 824735400720481514, 41969556121016094021, 7841042904081599033746826, 775474811976872476373043200886 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 26 12:19 EDT 2022. Contains 354882 sequences. (Running on oeis4.)