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A028868 Primes that when squared give numbers with digits in descending order. +0
4
2, 3, 29, 31 (list; graph; listen)
OFFSET

1,1
COMMENT

No other solutions below 2.10^9 (probably finite) - Dec 15 1999

CROSSREFS

Cf. A028869, A028865, A028866.

Sequence in context: A126266 A003017 A096580 this_sequence A081332 A106868 A098419

Adjacent sequences: A028865 A028866 A028867 this_sequence A028869 A028870 A028871

KEYWORD

nonn,base,hard

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com)

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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