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 A316488 #27 Feb 25 2024 06:00:20
%S A316488 97969,88998998929,97888999968769,38999699989995889,79949788888999969,
%T A316488 98987998979757889,99497897999899876,498999778899898896,
%U A316488 597998978979699969,799778987996998689,896899597989995889,899984989899599769,979978999994798769,989999999787828969
%N A316488 Squares whose arithmetic mean of digits is 8 (i.e., the sum of digits is 8 times the number of digits).
%C A316488 Each term's number of digits is in A174438 (Numbers that are congruent to {0, 2, 5, 8} mod 9). For every positive term k in A174438, it appears that this sequence contains at least one k-digit term with the exception of k=2, k=8, and k=9. (See A316480.)
%H A316488 Giovanni Resta, <a href="/A316488/b316488.txt">Table of n, a(n) for n = 1..97</a> (terms < 10^28; first 15 terms from Jon E. Schoenfield)
%e A316488 313^2 = 97969, a 5-digit number whose digit sum is 9+7+9+6+9 = 40 = 8*5, so 97969 is a term.
%e A316488 9949823114^2 = 98998979999888656996, a 20-digit number whose digit sum is 9+8+9+9+8+9+7+9+9+9+9+8+8+8+6+5+6+9+9+6 = 160 = 8*20, so 98998979999888656996 is a term.
%Y A316488 Cf. A069711, A174438, A316480.
%Y A316488 Intersection of A000290 and A061425. - _Michel Marcus_, Jul 06 2018
%K A316488 nonn,base
%O A316488 1,1
%A A316488 _Jon E. Schoenfield_, Jul 04 2018