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A069324 Primes in A068949. 4
13, 19, 31, 43, 61, 67, 73, 79, 97, 103, 109, 127, 139, 157, 163, 181, 193, 199, 211 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Differs from A040047 at the 13th term. - Kevin Buzzard (k.buzzard(AT)imperial.ac.uk), Jun 20 2008

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

a(4)=43 since the fourth prime in A068949 is 43.

PROG

(PARI) disum(n)= { local(resul) ; resul=0 ; while(n>0, resul += n%10 ; n = (n-n%10)/10 ; ) ; return(resul) ; } A069324(maxs)= { local(ssqu, su) ; su=1 ; for(s=1, maxs, ssqu=s^2 ; if (disum(ssqu) > su, su=disum(ssqu) ; if( isprime(su), print1(su, ", ") ; ) ; ) ; ) ; } A069324(200000000) ; - R. J. Mathar, May 19 2006

CROSSREFS

Cf. A068809, A068949, A068952, A040047.

Sequence in context: A244311 A164333 A182365 * A040047 A163847 A051644

Adjacent sequences:  A069321 A069322 A069323 * A069325 A069326 A069327

KEYWORD

more,nonn,base

AUTHOR

Francois Jooste (phukraut(AT)hotmail.com), Mar 15 2002

EXTENSIONS

a(12) from R. J. Mathar, May 19 2006

a(13)-a(14) from Kevin Buzzard (k.buzzard(AT)imperial.ac.uk), Jun 20 2008

a(15)-a(19) from Giovanni Resta, Jun 27 2018

STATUS

approved

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Last modified December 15 09:05 EST 2019. Contains 329995 sequences. (Running on oeis4.)