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 A361809 #8 Mar 25 2023 12:07:45 %S A361809 1,2,3,4,5,6,7,15,46,58,817,5494,8502 %N A361809 Fixed points of A181820 and A361808. %C A361809 Numbers k such that the partition with Heinz number k is identical to the partition given by the prime signature of A025487(k). %C A361809 There are no more terms below 10177058 = A025488(143). %F A361809 A181820(a(n)) = A361808(a(n)) = a(n). %e A361809 4 is a term because the partition with Heinz number 4 = 2^2 = prime(1)^2 is (1,1), which is identical to the partition given by the prime signature of A025487(4) = 6 = 2^1*3^1. %e A361809 15 is a term because the partition with Heinz number 15 = 3*5 = prime(2)*prime(3) is (2,3), which is identical to the partition given by the prime signature of A025487(15) = 72 = 2^3*3^2. %e A361809 8502 is a term because the partition with Heinz number 8502 = 2*3*13*109 = prime(1)*prime(2)*prime(6)*prime(29) is (1,2,6,29), which is identical to the partition given by the prime signature of A025487(8502) = 68491306598400 = 2^29*3^6*5^2*7. %Y A361809 Cf. A025487, A025488, A181820, A361808. %K A361809 nonn,more %O A361809 1,2 %A A361809 _Pontus von Brömssen_, Mar 25 2023