id:A102112 - OEIS Search Results

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Iccanobirt numbers (2 of 15): a(n) = a(n-1) + R(a(n-2)) + a(n-3), where R is the digit reversal function A004086.

+0
7

0, 0, 1, 1, 2, 4, 7, 13, 24, 62, 117, 167, 940, 1818, 2034, 11155, 17275, 74420, 142846, 162568, 885229, 1893336, 2978492, 10197702, 15039830, 38797423, 52888176, 100407789, 206394037, 1246986214, 2077887605, 6411178063, 12726051979 (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)) = A102120(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]]+a[n-3]; Table[a[n], {n, 0, 40}]`
	CROSSREFS	`Cf. A102111-A102125.` `Sequence in context: A086445 A127602 A113291 this_sequence A102113 A034440 A000074` `Adjacent sequences: A102109 A102110 A102111 this_sequence A102113 A102114 A102115`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Jonathan Vos Post (jvospost2(AT)yahoo.com) and Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 30 2004`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

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