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 A072671 #19 Apr 26 2023 11:55:00 %S A072671 0,3,11,23,35,59,191,119,179,239,575,359,1295,899,719,839,9215,1259, %T A072671 786431,1679,2879,15359,3599,2519,6479,61439,6299,6719,2359295,5039, %U A072671 3221225471,7559,46079,983039,25919,10079,206158430207,32399,184319,15119,44099,20159,5308415,107519,25199,2985983,9663676415,27719,233279,45359 %N A072671 Least m which can be written as i*j+i+j in n different ways: A072670(m)=n. %C A072671 a(n) = A038549(n+1) - 1. %Y A072671 Cf. A038549, A072670. %K A072671 nonn %O A072671 0,2 %A A072671 _Reinhard Zumkeller_, Jun 30 2002