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A226803 Primes p where the digital sum of p^2 is equal to 7. 4
5, 149, 1049 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No more terms below 10^9. - Michel Marcus, Nov 02 2013

No more terms below 10^20. - Hiroaki Yamanouchi, Sep 23 2014

Sequence is complete, because A215614 is complete. - Robert Israel, Sep 23 2014

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

5 is in the sequence because 5^2 = 25 and 2 + 5 = 7.

149 is in the sequence because 149^2 = 22201 and 2 + 2 + 2 + 0 + 1 = 7.

MATHEMATICA

Select[Prime[Range[10000]], Total[IntegerDigits[#^2]] == 7 &]

PROG

(MAGMA) [p: p in PrimesUpTo(6*10^6) | &+Intseq(p^2) eq 7];

(PARI) lista(nn) = {forprime(p=2, nn, if (sumdigits(p^2)==7, print1(p, ", ")); ); } \\ Michel Marcus, Nov 02 2013

CROSSREFS

Cf. A226802, A165492, A165459, A165493, A215614.

Sequence in context: A281427 A294360 A075186 * A332716 A230666 A113560

Adjacent sequences:  A226800 A226801 A226802 * A226804 A226805 A226806

KEYWORD

nonn,base,bref,fini,full

AUTHOR

Vincenzo Librandi, Jun 24 2013

STATUS

approved

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Last modified May 18 10:19 EDT 2021. Contains 343995 sequences. (Running on oeis4.)