A086655 (C(2p,p)-2)/(2p) where p runs through the primes.

1, 3, 25, 245, 32065, 400023, 68635477, 930138521, 178987624513, 518401146543811, 7506908923471953, 23596358977508462295, 5180299766448679532059, 77180849825857621779893

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 A357232

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