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 A061388 #18 Apr 28 2023 08:17:47 %S A061388 5,19,28,37,46,55,64,73,82,91,159,168,177,186,195,249,258,267,276,285, %T A061388 294,339,348,357,366,375,384,393,429,438,447,456,465,474,483,492,519, %U A061388 528,537,546,555,564,573,582,591,609,618,627,636,645,654,663,672,681 %N A061388 Sum of digits = 5 times number of digits. %H A061388 Delbert L. Johnson, <a href="/A061388/b061388.txt">Table of n, a(n) for n = 1..20000</a> %e A061388 186 is a term as the arithmetic mean of the digits is (1+8+6)/3 = 5. %t A061388 Select[Range[685],Total[x=IntegerDigits[#]]==5*Length[x] &] %o A061388 (Magma) [ n: n in [1..700] | &+Intseq(n) eq 5*#Intseq(n) ]; // _Bruno Berselli_, Jun 30 2011 %Y A061388 Cf. A061383, A061384, A061385, A061386, A061387, A061423, A061424, A061425. %K A061388 nonn,base,easy %O A061388 1,1 %A A061388 _Amarnath Murthy_, May 03 2001 %E A061388 More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001