Average of twin-prime pairs for pairs that are expressible as the sum of two triangular numbers.

Terms

a(0) =12a(1) =30a(2) =138a(3) =192a(4) =462a(5) =660a(6) =822a(7) =1092a(8) =1722a(9) =2028a(10) =2082a(11) =2712a(12) =3360a(13) =3540a(14) =3918a(15) =6132a(16) =6762a(17) =7590a(18) =7878a(19) =7950a(20) =8220a(21) =9462a(22) =9858a(23) =11352a(24) =12108a(25) =12378a(26) =13692a(27) =13998a(28) =14448a(29) =16140