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A204921 a(n) = (p(n)^2 - q(n)^2)/n, where (p(n)^2, q(n)^2) is the least pair of squared primes (ordered as at A204914) for which n divides p(n)^2 - q(n)^2. 1
5, 8, 7, 4, 1, 4, 3, 2, 5, 4, 15, 2, 9, 8, 3, 1, 21, 4, 15, 2, 1, 12, 24, 1, 21, 12, 31, 4, 33, 4, 27, 3, 5, 12, 8, 2, 24, 24, 3, 1, 45, 4, 39, 6, 1, 12, 24, 2, 45, 12, 7, 6, 24, 8, 3, 2, 5, 24, 63, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For a guide to related sequences, see A204892.

LINKS

Table of n, a(n) for n=1..60.

MATHEMATICA

(See the program at A204900.)

CROSSREFS

Cf. A204900, A204892.

Sequence in context: A021067 A047914 A005480 * A021867 A165909 A243598

Adjacent sequences:  A204918 A204919 A204920 * A204922 A204923 A204924

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 20 2012

STATUS

approved

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Last modified November 20 14:54 EST 2019. Contains 329337 sequences. (Running on oeis4.)