Primes p such that sigma(p+1) = sigma(p+2).

Terms

a(0) =13a(1) =4363a(2) =33997a(3) =162601a(4) =230389a(5) =289453a(6) =949633a(7) =1154173a(8) =1642153a(9) =3296863a(10) =5003737a(11) =7955491a(12) =10118653a(13) =10813423a(14) =12673093a(15) =28440043a(16) =29097781a(17) =34577833a(18) =41171023a(19) =50128033a(20) =57453493a(21) =67798663a(22) =81166837a(23) =86701393a(24) =94682131a(25) =97716517a(26) =100600729a(27) =184677601a(28) =191710069