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 A333015 #10 Mar 06 2020 08:11:11 %S A333015 205427,210552,230102,269712,333802,346977,354537,384802,397892, %T A333015 416677,420077,426622,448552,470902,471927,478302,509752,520852, %U A333015 563772,566177,569507,571377,575202,580302,586102,590162,599847,610052,616552,618263,635552,646177,647947 %N A333015 Numbers which can be written in exactly five ways as a sum of two distinct nonzero pentagonal numbers. %e A333015 205427 = P(234) + P(287) = P(201) + P(311) = P(166) + P(331) = P(56) + P(366) = P(49) + P(367), where P(n) is the n-th pentagonal number (A000326). %o A333015 (PARI) is(k) = sum(i=1, sqrt(1+12*k)\6, sqrt(1+24*k+12*i-36*i*i)%6==5) == 5; \\ _Jinyuan Wang_, Mar 06 2020 %Y A333015 Cf. A000326, A332988, A332989, A333011, A333012, A333013, A333014. %K A333015 nonn %O A333015 1,1 %A A333015 _Olivier Gérard_, Mar 05 2020 %E A333015 More terms from _Jinyuan Wang_, Mar 06 2020