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A050721 Primes arising in A083571. 3
2, 3, 11, 109, 173, 5513600773 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Prime indices of palindromic triangular numbers.
LINKS
CROSSREFS
Sequence in context: A300898 A079853 A358602 * A058114 A042337 A061482
KEYWORD
nonn,base,hard
AUTHOR
Patrick De Geest, Sep 15 1999
STATUS
approved

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Last modified June 16 10:42 EDT 2024. Contains 373425 sequences. (Running on oeis4.)