n is prime and is the sum of the first k primes for some k, start from 5.

Terms

a(0) =5a(1) =23a(2) =53a(3) =233a(4) =563a(5) =1259a(6) =2579a(7) =2909a(8) =12713a(9) =22543a(10) =28099a(11) =31729a(12) =39607a(13) =41017a(14) =42463a(15) =87511a(16) =110359a(17) =115279a(18) =117787a(19) =138863a(20) =141671a(21) =213533a(22) =242243a(23) =257353a(24) =265117a(25) =269069a(26) =289171a(27) =310019a(28) =318557a(29) =327193