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A102113 Iccanobirt numbers (3 of 15): a(n) = a(n-1) + R(a(n-2)) + R(a(n-3)), where R is the digit reversal function A004086. 5
0, 0, 1, 1, 2, 4, 7, 13, 24, 62, 135, 203, 760, 1593, 1962, 5980, 12622, 16208, 39724, 142606, 265660, 914694, 1587497, 2150478, 10594748, 27283111, 120773124, 216660897, 649176190, 1868619823, 2758358381, 6139199008, 11266906261 (list; graph; refs; listen; history; internal format)
OFFSET

0,5

COMMENTS

Digit reversal variation of Tribonacci numbers A000073.

Inspired by Iccanobif numbers: A001129, A014258-A014260.

FORMULA

A004086(a(n)) = A102121(n).

MATHEMATICA

R[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Clear[a]; a[0]=0; a[1]=0; a[2]=1; a [n_]:=a[n]=a[n-1]+R[a[n-2]]+R[a[n-3]]; Table[a[n], {n, 0, 40}]

CROSSREFS

Cf. A102111-A102125.

Sequence in context: A127602 A113291 A102112 * A034440 A000074 A079958

Adjacent sequences:  A102110 A102111 A102112 * A102114 A102115 A102116

KEYWORD

nonn,base,easy

AUTHOR

Jonathan Vos Post (jvospost3(AT)gmail.com) and Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 30 2004

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.