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 A180316 #11 Jan 09 2020 14:07:50
%S A180316 0,11,23,36,40,55,61,78,86,95,105,116,128,131,145,150,166,173,181,190,
%T A180316 200,211,223,236,240,255,261,278,286,295,305,316,328,331,345,350,366,
%U A180316 373,381,390,400,411,423,436,440,455,461,478,486,495,505,516,528,531,545,550,566
%N A180316 Concatenation of n and A008954(n).
%H A180316 Harvey P. Dale, <a href="/A180316/b180316.txt">Table of n, a(n) for n = 0..1000</a>
%F A180316 From _Chai Wah Wu_, Jan 09 2020: (Start)
%F A180316 a(n) = a(n-1) + a(n-5) - a(n-6) - a(n-10) + a(n-11) + a(n-15) - a(n-16) for n > 15.
%F A180316 G.f.: x*(10*x^14 + 9*x^13 + 8*x^12 + 7*x^11 + 16*x^10 - 5*x^9 + 5*x^8 - 5*x^7 + 5*x^6 - 5*x^5 + 15*x^4 + 4*x^3 + 13*x^2 + 12*x + 11)/(x^16 - x^15 - x^11 + x^10 + x^6 - x^5 - x + 1). (End)
%t A180316 Module[{nn=60},10#[[1]]+Mod[#[[2]],10]&/@Thread[{Range[0,nn], Accumulate[ Range[ 0,nn]]}]] (* _Harvey P. Dale_, Oct 21 2016 *)
%Y A180316 Cf. A008954
%K A180316 easy,base,nonn
%O A180316 0,2
%A A180316 _Odimar Fabeny_, Aug 27 2010
%E A180316 keyword:base added and sequence extended - _R. J. Mathar_, Sep 23 2010