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A052035 Palindromic primes whose sum of squared digits is also prime. 2
11, 101, 131, 191, 313, 353, 373, 797, 919, 10301, 11311, 12721, 13331, 13931, 14341, 14741, 16361, 17971, 18181, 19391, 30103, 30703, 33533, 71317, 71917, 74747, 75557, 76367, 77977, 79397, 90709, 93139, 93739, 95959, 96769, 97379 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Journal of Recreational Mathematics, Vol. 20(2), 1988, Charles W. Trigg.

"Hands On Numbers Count", Personal Computer World, 1997, p. 290.

LINKS

Table of n, a(n) for n=1..36.

EXAMPLE

E.g. 373 -> 3^2+7^2+3^2 = 67 and prime.

CROSSREFS

Cf. A052034, A003132.

Sequence in context: A088281 A068685 A109830 * A083144 A058411 A134462

Adjacent sequences:  A052032 A052033 A052034 * A052036 A052037 A052038

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Dec 15 1999.

STATUS

approved

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Last modified July 17 01:41 EDT 2018. Contains 312693 sequences. (Running on oeis4.)