id:A102111 - OEIS Search Results

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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.

+0
19

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; listen)

	OFFSET	`0,5`
	COMMENT	`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 this_sequence A059633 A088353 A018184` `Adjacent sequences: A102108 A102109 A102110 this_sequence 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 November 25 20:09 EST 2009. Contains 167514 sequences.

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