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%I #6 Jun 12 2023 16:56:42
%S 1,2,23,263,2917,38639,603311,11093633,236524303,5782539281
%N Let s(n) = n-th single prime (cf. A007510). Sequence is defined by recurrence a(n+1) = s(a(n)), n = 0,1,2,..., a(0)=1.
%C This is the "isolated prime Eratosthenes progression at base 1 (ipep(1))". The next ipep are: ipep(3) = 3, 37, 397, 4751, 64403, 1038629, 19661749,...; ipep(4) = 4, 47, 491, 5897, 81131, 1328167, 25467419,...; ipep(5) = 5, 53, 557, 6709, 93287, 1541191, 29778547,...; ...; ipep(22)= 22, 257, 2861, 37799, 589181, 10821757, 230452837,... ipep(24)= 24, 277, 3079, 40823, 640121, 11807167, 252480587,... and so on.
%C In the terminology of A007097 the name is "isolated_prime-th recurrence ..."
%D "Isolated Primes", by Richard L. Francis, J. Rec. Math., 11 (1978), 17-22.
%Y Cf. A007097, A063502.
%K hard,nonn
%O 0,2
%A _Lubomir Alexandrov_, Sep 07 2001
%E a(9) from _Sean A. Irvine_, Jun 12 2023
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