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A085877
Smallest square k^2 == 1 (mod 10^n) where k > 1.
2
81, 2401, 62001, 1560001, 351600001, 47852000001, 610350000001, 586547900000001, 5508423000000001, 2032852170000000001, 184259414700000000001, 26756525040000000000001, 26756525040000000000001
OFFSET
1,1
COMMENTS
Sequence is infinite as (10^n + 1)^2 is a candidate, i.e. a(n) < = (10^n +1)^2.
FORMULA
a(n) = A181539(n)^2.
CROSSREFS
Cf. A085878.
Sequence in context: A038676 A016840 A128832 * A123219 A205512 A297606
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Jul 07 2003
EXTENSIONS
Corrected and extended by Ray Chandler, Jul 09 2003
STATUS
approved