a(n) is the first number that is the sum of two palindromic primes in exactly n ways.

Terms

a(0) =0a(1) =4a(2) =10a(3) =504a(4) =25242a(5) =1110a(6) =28782a(7) =46764a(8) =46254a(9) =86058a(10) =50094a(11) =47874a(12) =107880a(13) =108180a(14) =110100a(15) =108990a(16) =107070a(17) =109800a(18) =2726262a(19) =2830272a(20) =2698962a(21) =3029292a(22) =2900982a(23) =2799972a(24) =2979792a(25) =3100002a(26) =2998992a(27) =4498944a(28) =4409034a(29) =4709064