Numbers k such that (k-1, k+1) and (k/2-1, k/2+1) are both pairs of twin primes.

Terms

a(0) =12a(1) =60a(2) =1320a(3) =1620a(4) =4260a(5) =5100a(6) =6660a(7) =6780a(8) =11700a(9) =12540a(10) =21060a(11) =66360a(12) =83220a(13) =88260a(14) =107100a(15) =110880a(16) =114660a(17) =127680a(18) =130200a(19) =140760a(20) =141960a(21) =144540a(22) =148200a(23) =149520a(24) =157560a(25) =161340a(26) =163860a(27) =175080a(28) =186480a(29) =204600