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A087385 a(n) = smallest prime == 1 (mod T(n)) where T(n) is the n-th triangular number (A000217). 0
2, 7, 7, 11, 31, 43, 29, 37, 181, 331, 67, 79, 547, 211, 241, 137, 307, 2053, 191, 211, 463, 1013, 277, 601, 1301, 3511, 379, 2437, 1741, 1861, 1489, 2113, 1123, 2381, 631, 1999, 4219, 1483, 2341, 821, 1723, 3613, 947, 991, 6211, 12973, 1129, 3529, 7351 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

The prime corresponding to the triangular number 21 is 43.

CROSSREFS

Sequence in context: A316352 A114532 A003061 * A168278 A267499 A090521

Adjacent sequences:  A087382 A087383 A087384 * A087386 A087387 A087388

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Sep 09 2003

EXTENSIONS

More terms from Sam Alexander, Dec 28 2003

STATUS

approved

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Last modified January 23 01:30 EST 2020. Contains 331166 sequences. (Running on oeis4.)