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 A116372 #5 Feb 16 2025 08:33:00 %S A116372 0,1,0,1,0,1,0,1,0,1,1,1,1,1,1,1,1,1,1,2,1,3,1,3,1,3,1,3,2,3,3,3,4,3, %T A116372 4,3,4,4,4,6,4,7,4,8,4,8,5,8,7,8,9,8,10,8,11,9,11,12,11,15,11,17,11, %U A116372 18,12,19,15,19,19,19,22,19,24,20,25,24,26,29,26,34,26,37,27,39,31,40,38,41 %N A116372 Number of partitions of n into parts with digital root = 2. %C A116372 a(n) = A114102(n) - A116371(n) - A116373(n) - A116374(n) - A116375(n) - A116376(n) - A116377(n) - A116378(n) - A114099(n). %H A116372 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DigitalRoot.html">Digital Root</a> %e A116372 a(31) = #{29+2, 20+11, 11+2+2+2+2+2} = 3. %Y A116372 Cf. A010888. %Y A116372 A147706. [From _Reinhard Zumkeller_, Nov 11 2008] %K A116372 nonn,base %O A116372 1,20 %A A116372 _Reinhard Zumkeller_, Feb 12 2006