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A250433 Numbers whose squares remain squares when prepended with 7 and appended with 25 in base 10. 3
260355890, 507772957604920, 138060730605508232231178662796610, 41659593852939906475539587793151784, 849684968293046546038644821334016760090110 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

260355890^2 = 67785189457692100, 76778518945769210025 = 8762335245^2.

CROSSREFS

Cf. A249621, A249968, A249969, A249970, A249971, A249972, A250434, A250435.

Sequence in context: A205934 A231202 A226448 * A329464 A125576 A233501

Adjacent sequences:  A250430 A250431 A250432 * A250434 A250435 A250436

KEYWORD

nonn,base,more

AUTHOR

Chai Wah Wu, Nov 23 2014

EXTENSIONS

a(5) from Chai Wah Wu, Jul 20 2017

STATUS

approved

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Last modified January 19 21:47 EST 2020. Contains 331066 sequences. (Running on oeis4.)