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A102111 Iccanobirt numbers (1 of 15): a(n) = a(n-1) + a(n-2) + R(a(n-3)), where R is the digit reversal function A004086. 18
0, 0, 1, 1, 2, 4, 7, 13, 24, 44, 99, 185, 328, 612, 1521, 2956, 4693, 8900, 20185, 33049, 53332, 144483, 291848, 459666, 1135955, 2443813, 4246722, 12285846, 19716010, 34278280, 118852511, 154192582, 281332336, 550783729, 1117407516, 2301424427 (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)) = A102119(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]+a[n-2]+R[a[n-3]]; Table[a[n], {n, 0, 40}]

CROSSREFS

Cf. A102112-A102125.

Sequence in context: A000073 A160254 A005318 * A059633 A088353 A192654

Adjacent sequences:  A102108 A102109 A102110 * A102112 A102113 A102114

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 17 10:05 EST 2012. Contains 206009 sequences.