cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A137692 Primes of the form A128646(k)+1 for some k (listed in A137691), where A128646 = denominators of partial sums of 1/(p(i)-1).

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%I A137692 #10 Jul 18 2021 03:04:51
%S A137692 2,3,5,11,13,61,18481,55441,53413361,11827018732969441
%N A137692 Primes of the form A128646(k)+1 for some k (listed in A137691), where A128646 = denominators of partial sums of 1/(p(i)-1).
%C A137692 The next term is A128646(376)+1, which has 226 decimal digits.
%o A137692 (PARI) A137691v = [1,2,3,4,5,6,10,11,12,13,14,18,38,376,377,378,379,380,381,382,383,384,385] /*see there*/; A137692 = vecsort(vector(15,k,A128646(A137691v[k])+1),8) /* ...,8 removes duplicate entries in PARI > 2.4.1 */
%Y A137692 Cf. A128646, A137689, A137690, A137691, A092063.
%K A137692 nonn
%O A137692 1,1
%A A137692 _M. F. Hasler_, Feb 07 2008