Numbers k such that both Sum_{i=1..k} i*prime(i) and Sum_{i=1..k} (k+1-i)*prime(i) are prime.

Terms

a(0) =1a(1) =3a(2) =199a(3) =351a(4) =1583a(5) =1955a(6) =2579a(7) =2627a(8) =3251a(9) =3407a(10) =3503a(11) =5311a(12) =6359a(13) =6819a(14) =7295a(15) =7547a(16) =8791a(17) =9663a(18) =10143a(19) =10591a(20) =11499a(21) =11579a(22) =12199a(23) =12443a(24) =14527a(25) =15563a(26) =15583a(27) =16051a(28) =16543a(29) =16655