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 A102123 Iccanobirt numbers (13 of 15): a(n) = R(R(a(n-1)) + a(n-2) + R(a(n-3))), where R is the digit reversal function A004086. 5
 0, 0, 1, 1, 2, 4, 7, 31, 42, 26, 711, 761, 49, 279, 8811, 1651, 44311, 38141, 55006, 45901, 34108, 990681, 161132, 5891031, 6129461, 8041777, 45820251, 74839842, 60558487, 202825861, 635089352, 309192535, 7549098331, 8252802091 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Digit reversal variation of tribonacci numbers A000073. Inspired by Iccanobif numbers: A001129, A014258-A014260. LINKS FORMULA a(n) = A004086(A102115(n)). MATHEMATICA R[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Clear[a]; a[0]=0; a[1]=0; a[2]=1; a [n_]:=a[n]=R[R[a[n-1]]+a[n-2]+R[a[n-3]]]; Table[a[n], {n, 0, 40}] CROSSREFS Cf. A102111-A102125. Sequence in context: A280820 A280377 A102122 * A102125 A102124 A280713 Adjacent sequences:  A102120 A102121 A102122 * A102124 A102125 A102126 KEYWORD nonn,base,easy AUTHOR Jonathan Vos Post and Ray Chandler, Dec 30 2004 STATUS approved

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Last modified October 16 03:28 EDT 2019. Contains 328040 sequences. (Running on oeis4.)