Indices of monotonically increasing primes which centrally enclose the prime sequence in A133781.

Terms

a(0) =31a(1) =32a(2) =36a(3) =40a(4) =187a(5) =321a(6) =327a(7) =452a(8) =580a(9) =590a(10) =821a(11) =831a(12) =940a(13) =942a(14) =946a(15) =955a(16) =965a(17) =1186a(18) =1194a(19) =1198a(20) =1200a(21) =1208a(22) =1213a(23) =419a(24) =429a(25) =2362a(26) =2367a(27) =3348a(28) =3350a(29) =3353