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 A341192 #7 Feb 07 2021 13:10:15
%S A341192 1,3,6,10,15,21,28,36,45,52,60,66,70,72,72,70,66,60,55,45,39,34,30,27,
%T A341192 25,24,24,24,27,27,25,27,27,27,27,27,27,27,27,30,27,27,30,30,30,30,30,
%U A341192 30,30,30,33,27,30,33,33,33,33,33,33,33,33,36,27,34,36,36,36,36
%N A341192 Number of ways to write n as an ordered sum of 3 nonzero decimal palindromes.
%H A341192 Alois P. Heinz, <a href="/A341192/b341192.txt">Table of n, a(n) for n = 3..20000</a>
%t A341192 nmax = 70; CoefficientList[Series[Sum[Boole[PalindromeQ[k]] x^k, {k, 1, nmax}]^3, {x, 0, nmax}], x] // Drop[#, 3] &
%Y A341192 Cf. A002113, A136522, A261131, A261132, A261422, A341156, A341191, A341193.
%K A341192 nonn,base
%O A341192 3,2
%A A341192 _Ilya Gutkovskiy_, Feb 06 2021