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.
%I A085066 #10 Aug 28 2025 04:51:47 %S A085066 6,55,111,334,335,671,1343,16117,16118,64473,64474,257897,2063177, %T A085066 8252709,41263546,123790639,371371918,1485487673,2970975347, %U A085066 59419506941,356517041647,5704272666353,11408545332707,262396542652262 %N A085066 a(1) = 6, a(n) = smallest number of the form k*a(n-1) +1 with the same prime signature p*q (6 = 2*3), where p and q are primes. %C A085066 Is this the same as A085067? - _R. J. Mathar_, Aug 28 2025 %Y A085066 A061092 gives the sequence with a(1) = 2 i.e. terms of the form k*a(n-1)+1 which are primes.( prime signature p^1) %Y A085066 Cf. A061092, A085065. %K A085066 nonn,changed %O A085066 1,1 %A A085066 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 29 2003 %E A085066 Corrected and extended by _David Wasserman_, Jan 11 2005