a(n) = (p_n + 1)*q_n - 1; where (p_n, q_n) is the n-th twin prime pair.

Terms

a(0) =19a(1) =41a(2) =155a(3) =341a(4) =929a(5) =1805a(6) =3659a(7) =5255a(8) =10505a(9) =11771a(10) =19181a(11) =22649a(12) =32579a(13) =37055a(14) =39401a(15) =52211a(16) =57839a(17) =73169a(18) =79805a(19) =97655a(20) =121451a(21) =176819a(22) =187055a(23) =213905a(24) =273005a(25) =325469a(26) =360599a(27) =382541a(28) =412805a(29) =436259