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 A116322 #7 Jul 17 2021 01:44:34 %S A116322 41,59,32262233,67737767,79321057,3341093417798787499094, %T A116322 3861488851737861033962,4747922651210186579788,5252077348789813420212, %U A116322 6138511148262138966038,6658906582201212500906,7232275368591793618232 %N A116322 Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+5. %e A116322 79321057 * 79321058 = 62918301//62918306, where // denotes concatenation. %Y A116322 Cf. A116112, A116314, A116323, A116329. %K A116322 nonn,base %O A116322 1,1 %A A116322 _Giovanni Resta_, Feb 06 2006