Numbers k such that (k, k+2) are not twin primes yet sigma(k+2)/d(k+2) - sigma(k)/d(k) = 1.

Terms

a(0) =1a(1) =350a(2) =6497a(3) =12317a(4) =133787a(5) =181427a(6) =404471a(7) =439097a(8) =485237a(9) =501182a(10) =549378a(11) =1410119a(12) =2696807a(13) =6220607a(14) =6827369a(15) =6954767a(16) =9770027a(17) =10302419a(18) =10449347a(19) =10887977a(20) =11014007a(21) =16745387a(22) =18959111a(23) =25883519a(24) =27334469a(25) =39508037a(26) =40311149a(27) =40551617a(28) =42561437a(29) =44592209