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 A129081 Primes appearing in partial sums of A030433 (primes ending in 9). 3
 19, 107, 523, 1279, 1787, 4091, 16103, 18041, 46889, 68437, 104561, 155443, 161641, 174367, 187573, 303473, 330587, 359231, 419929, 430517, 634793, 878939, 974507, 1469753, 1510319, 1700851, 1902653, 2836961, 2982841, 3476299, 3807589 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Muniru A Asiru, Table of n, a(n) for n = 1..3000 FORMULA a(n) = A030433(1)+A030433(2)+...+A030433(x); a is a prime number. EXAMPLE a(5) = 1787 because 1787 = A030433(1) + A030433(2) + A030433(3) + A030433(4) + A030433(5) + A030433(6) + A030433(7) + A030433(8) + A030433(9) + A030433(10) + A030433(11) + A030433(12) + A030433(13) = 19 + 29 + 59 + 79 + 89 + 109 + 139 + 149 + 179 + 199 + 229 + 239 + 269; and 1787 is a prime number. MATHEMATICA With[{pr9s=Select[Prime[Range[3000]], Last[IntegerDigits[#]]==9&]}, Select[ Accumulate[ pr9s], PrimeQ]] (* Harvey P. Dale, Dec 31 2011 *) PROG (PARI) {s=0; forprime(p=2, 17300, if(p%10==9, s+=p; if(isprime(s), print1(s, ", "))))} /* Klaus Brockhaus, May 13 2007 */ (GAP) P:=Filtered(List([1..5*10^5], n->10*n+9), IsPrime);; a:=Filtered(List([1..Length(P)], i->Sum([1..i], k->P[k])), IsPrime); # Muniru A Asiru, Apr 28 2018 CROSSREFS Cf. A030433, A000040. Sequence in context: A300644 A142300 A238108 * A282324 A264825 A142322 Adjacent sequences:  A129078 A129079 A129080 * A129082 A129083 A129084 KEYWORD easy,base,nonn AUTHOR Tomas Xordan, May 11 2007 EXTENSIONS Entries checked by Klaus Brockhaus, May 13 2007 Better description from Harvey P. Dale, Dec 31 2011 STATUS approved

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Last modified January 18 11:57 EST 2022. Contains 350455 sequences. (Running on oeis4.)