Primes in A007468.

Terms

a(0) =2a(1) =31a(2) =199a(3) =659a(4) =1601a(5) =5693a(6) =38917a(7) =51797a(8) =84463a(9) =697373a(10) =8059169a(11) =8510617a(12) =9465251a(13) =28268543a(14) =36254039a(15) =40121999a(16) =48667219a(17) =54973229a(18) =63627491a(19) =90443813a(20) =97626083a(21) =102534899a(22) =110364689a(23) =139100699a(24) =161967391a(25) =183528421a(26) =219566989