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 A161356 #9 Jul 11 2025 08:40:04 %S A161356 132132,406406,510510,852852,79307930,6694266942,113322113322, %T A161356 440056440056,52892565289256,5847751058477510,111333222111333222, %U A161356 164378892164378892,183673470183673470,200444410200444410,206611570206611570,224376732224376732,277008310277008310,297520662297520662 %N A161356 Pronic numbers A002378 (AA) that can be divided into two equal strings (A). %F A161356 a(n) = A116285(n)*(A116285(n)+1). - _Michael S. Branicky_, Jul 11 2025 %e A161356 132132 = 363 x 364 and can be divided into two equal strings (132), so it is a term. %e A161356 406406 = 637 x 638, 510510 = 714 x 715, 852852 = 923 x 924, 79307930 = 8905 x 8906 are terms. %Y A161356 Cf. A116285. %K A161356 nonn,base %O A161356 1,1 %A A161356 _Claudio Meller_, Jun 07 2009 %E A161356 a(6)-a(14) from _Donovan Johnson_, Jun 15 2009 %E A161356 a(15)-a(18) from _Michael S. Branicky_, Jul 11 2025 using A116285