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The digits of the prime 15559 appear as the final digits of
the numbers in the sequence of
centered tetrahedral numbers. The
pattern 15559 repeats for each successive group of 5
consecutive numbers in the sequence. The first five numbers
in the sequence are
1,5,15,35,69. (15559 is also the zip code of Schellsburg PA.) [Green]
(There is one curio for this number that has not yet been approved by an editor.)
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