Last prime in n-th run of successive primes in A375564.

Terms

a(0) =3a(1) =7a(2) =19a(3) =43a(4) =83a(5) =167a(6) =349a(7) =683a(8) =1361a(9) =2699a(10) =5387a(11) =10739a(12) =21467a(13) =42863a(14) =85717a(15) =171103a(16) =341729a(17) =682811a(18) =1364747a(19) =2728129a(20) =5454167a(21) =10906271a(22) =21808453a(23) =43611721a(24) =87215467a(25) =174419101