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 A102115 #11 Dec 19 2015 00:28:30
%S A102115 0,0,1,1,2,4,7,13,42,44,117,779,1138,9801,3204,22135,57415,77633,
%T A102115 144214,541549,1123036,7257201,3095708,21636315,55486847,104580673,
%U A102115 482935860,247988412,1073911003,3317721397,9220077878,15106615327,89503015162
%N A102115 Iccanobirt numbers (5 of 15): a(n) = R(a(n-1)) + a(n-2) + R(a(n-3)), where R is the digit reversal function A004086.
%C A102115 Digit reversal variation of tribonacci numbers A000073.
%C A102115 Inspired by Iccanobif numbers: A001129, A014258-A014260.
%H A102115 Harvey P. Dale, <a href="/A102115/b102115.txt">Table of n, a(n) for n = 0..1000</a>
%F A102115 A004086(a(n)) = A102123(n).
%t A102115 R[n_]:=FromDigits[Reverse[IntegerDigits[n]]];Clear[a];a[0]=0;a[1]=0;a[2]=1;a [n_]:=a[n]=R[a[n-1]]+a[n-2]+R[a[n-3]];Table[a[n], {n, 0, 40}]
%t A102115 nxt[{a_,b_,c_}]:={b,c,Total[FromDigits/@Reverse/@IntegerDigits[ {a,c}]]+b}; Transpose[NestList[nxt,{0,0,1},35]][[1]] (* _Harvey P. Dale_, Dec 19 2011 *)
%Y A102115 Cf. A102111-A102125.
%K A102115 nonn,base,easy
%O A102115 0,5
%A A102115 _Jonathan Vos Post_ and _Ray Chandler_, Dec 30 2004