A028868 Primes that when squared give numbers with digits in descending order.

2, 3, 29, 31

Offset

1,1

Comments

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

Links

Table of n, a(n) for n=1..4.

Crossrefs

Cf. A028869, A028865, A028866.

Sequence in context: A096580 A351693 A324941 * A081332 A106868 A098419

Adjacent sequences: A028865 A028866 A028867 * A028869 A028870 A028871

Keyword

nonn,base,hard

Author

Patrick De Geest

Status

approved