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 A364278 #8 Jul 17 2023 12:37:07 %S A364278 1,0,0,1,1,4,24,47,153,669,5628,13554,61747,247170,1539565,16979571, %T A364278 53166394,268393296,1382097160,7831424654,59720804940,917256305956, %U A364278 3326800474687,20441030261195,112690616749302,773175024537549,5164903931159843,52976603588044961 %N A364278 Number of partitions of [n] with distinct block sizes such that no block contains its size as an element. %H A364278 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %e A364278 a(0) = 1: () the empty partition. %e A364278 a(3) = 1: 13|2. %e A364278 a(4) = 1: 124|3. %e A364278 a(5) = 4: 1235|4, 124|35, 125|34, 13|245. %Y A364278 Cf. A326493, A363881, A364279. %K A364278 nonn %O A364278 0,6 %A A364278 _Alois P. Heinz_, Jul 17 2023