Lesser of twin primes P(k) and P(k+1) such that Sd(P(k)) + Sd(P(k+1)) = Sd(k) + Sd(k+1), where Sd(x) is the sum of digits of x.

A277111

Lesser of twin primes P(k) and P(k+1) such that Sd(P(k)) + Sd(P(k+1)) = Sd(k) + Sd(k+1), where Sd(x) is the sum of digits of x.

Terms

    a(0) =1619a(1) =2309a(2) =2339a(3) =12239a(4) =28109a(5) =35081a(6) =37307a(7) =37571a(8) =50549a(9) =51059a(10) =51719a(11) =62129a(12) =64919a(13) =65729a(14) =87539a(15) =89519a(16) =91079a(17) =113759a(18) =121439a(19) =121631a(20) =160649a(21) =170351a(22) =174329a(23) =182129a(24) =191249a(25) =205949a(26) =215459a(27) =223679a(28) =231839a(29) =254039

External references