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 A255850 #20 Aug 21 2016 14:06:55 %S A255850 1,2,4,5,7,11,12,18,20,20,20,21,30,30,30,30,30,30,30,30,32,32,32,40, %T A255850 42,42,42,42,42,42,42,42,42,54,60,60,60,60,60,60,60,60,60,60,60,60,60, %U A255850 60,60,60,60,60,60,60,60,60,60,60,60,60,60,60,60,60,60,60 %N A255850 Number of digits in the n-th term of A061844: Squares which remain squares if you decrease every digit by 1. %C A255850 Suggested by W. Appleby in a Number Theory discussion group, cf. link. %H A255850 Lars Blomberg, <a href="/A255850/b255850.txt">Table of n, a(n) for n = 1..78</a> %H A255850 G. Campbell et al., <a href="https://www.linkedin.com/groups/six-digit-problem-4510047.S.5979621345422495746">A six digit problem</a>, Number Theory group on LinkedIn.com, March 2015. %F A255850 a(n) = A055642(A061844(n)). %o A255850 (PARI) a(n)=#Str(A061844(n)) \\ if A061844 is a function %o A255850 (PARI) A255850=apply(t->#Str(t),A061844) \\ if A061844 is a vector %Y A255850 Cf. A061844, A055642, A255851. %K A255850 nonn,base %O A255850 1,2 %A A255850 _M. F. Hasler_, Mar 10 2015 %E A255850 More terms calculated from A061844 by _Lars Blomberg_, Aug 21 2016