a(n) is the first k such that A277515(k) is the n-th prime.

Terms

a(0) =1a(1) =49a(2) =5a(3) =21a(4) =10a(5) =174a(6) =27a(7) =223a(8) =1656a(9) =3901a(10) =1286a(11) =1847a(12) =5095a(13) =3117a(14) =5678a(15) =1727a(16) =14844a(17) =23678a(18) =10986a(19) =33868a(20) =41241a(21) =42794a(22) =50451a(23) =35301a(24) =39546a(25) =206241a(26) =10561a(27) =89600a(28) =50075a(29) =87273