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A053429 Numbers n such that Catalan[n]+1 is prime. 1
0, 1, 2, 5, 11, 25, 69, 86, 90, 95, 104, 145, 203, 215, 227, 291, 309, 322, 337, 407, 480, 792, 823, 919, 1001, 1159, 2226, 2743, 2822, 4250 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Primality up to Catalan[4250]+1 proved by PrimeForm.

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

Catalan[25]+1=50!/25!/26!+1=4861946401453 is prime.

CROSSREFS

Cf. A000108, A053427.

Sequence in context: A047775 A001432 A127075 * A104237 A085945 A005469

Adjacent sequences:  A053426 A053427 A053428 * A053430 A053431 A053432

KEYWORD

nonn

AUTHOR

David Broadhurst, Jan 10 2000

STATUS

approved

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Last modified May 24 07:09 EDT 2013. Contains 225617 sequences.