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A039302 Number of distinct quadratic residues mod 5^n. 0
1, 3, 11, 53, 261, 1303, 6511, 32553, 162761, 813803, 4069011, 20345053, 101725261, 508626303, 2543131511, 12715657553, 63578287761, 317891438803, 1589457194011, 7947285970053, 39736429850261, 198682149251303, 993410746256511 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

Number of distinct n-digit suffixes of base 5 squares.

FORMULA

[ (5^n+3)*5/12 ].

CROSSREFS

Sequence in context: A129833 A107958 A053557 * A074512 A005502 A000255

Adjacent sequences:  A039299 A039300 A039301 * A039303 A039304 A039305

KEYWORD

nonn,easy

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 14 23:16 EST 2012. Contains 205687 sequences.