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 A334034 #11 Feb 16 2025 08:34:00 %S A334034 1,22,70,715,1330,4025,6370,14014,17290,25025,45815,73150,121030, %T A334034 95095,85085,256025,350350,432250,1179178,425425,575575,734825,950950, %U A334034 1926925,3751930,2187185,1616615,1956955,3148145,3658655,4029025,2977975,4352425,6656650,13918450 %N A334034 a(n) is the least integer that can be expressed as the difference of two pentagonal numbers in exactly n ways. %C A334034 The least integer that can be expressed as the sum of one or more consecutive numbers congruent to 1 mod 3 in exactly n ways. %C A334034 Index of first occurrence of n in A333815. %H A334034 Chai Wah Wu, <a href="/A334034/b334034.txt">Table of n, a(n) for n = 1..72</a> %H A334034 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PentagonalNumber.html">Pentagonal Number</a> %H A334034 <a href="/index/Pol#polygonal_numbers">Index to sequences related to polygonal numbers</a> %Y A334034 Cf. A000326, A016777, A038547, A068314, A333815, A334008, A334035, A334036, A334037. %K A334034 nonn %O A334034 1,2 %A A334034 _Ilya Gutkovskiy_, Apr 12 2020 %E A334034 More terms from _Jinyuan Wang_, Apr 13 2020