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%I #10 Oct 30 2017 16:51:42
%S 0,0,1,1,2,4,7,31,24,44,711,977,8311,1089,4023,53122,51475,33677,
%T 412441,945145,6303211,1027527,8075903,51363612,74868455,376085401,
%U 68539284,214889742,927862936,2360934421,2982905123,1968515515,8282454457
%N Iccanobirt numbers (10 of 15): a(n) = R(a(n-1) + R(a(n-2)) + a(n-3)), where R is the digit reversal function A004086.
%C Digit reversal variation of tribonacci numbers A000073.
%C Inspired by Iccanobif numbers: A001129, A014258-A014260.
%F a(n) = A004086(A102112(n)).
%t 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]+R[a[n-2]]+a[n-3]];Table[a[n], {n, 0, 40}]
%t nxt[{a_, b_, c_}] := {b, c, IntegerReverse[c + IntegerReverse[b] + a]}; NestList[nxt,{0,0,1},40][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Oct 30 2017 *)
%Y Cf. A102111-A102125.
%K nonn,base,easy
%O 0,5
%A _Jonathan Vos Post_ and _Ray Chandler_, Dec 30 2004