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A086655 (C(2p,p)-2)/(2p) where p runs through the primes. 1
1, 3, 25, 245, 32065, 400023, 68635477, 930138521, 178987624513, 518401146543811, 7506908923471953, 23596358977508462295, 5180299766448679532059, 77180849825857621779893 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

FORMULA

a(n) = A022553(prime(n)).

CROSSREFS

Sequence in context: A099913 A245925 A260209 * A064326 A006091 A009042

Adjacent sequences:  A086652 A086653 A086654 * A086656 A086657 A086658

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Sep 11 2003

EXTENSIONS

Typo in definition corrected by Vladimir Shevelev, Sep 05 2010

STATUS

approved

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Last modified November 30 06:11 EST 2020. Contains 338781 sequences. (Running on oeis4.)