id:A102114 - OEIS Search Results

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Iccanobirt numbers (4 of 15): a(n) = R(a(n-1)) + a(n-2) + a(n-3), where R is the digit reversal function A004086.

+0
6

0, 0, 1, 1, 2, 4, 7, 13, 42, 44, 99, 185, 724, 711, 1026, 7636, 8104, 12680, 24361, 37126, 99214, 102786, 823541, 347328, 1750070, 1871440, 2539179, 13340862, 31214950, 21821254, 89768624, 95723002, 131622637, 921717757, 985062768 (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)) = A102122(n).`
	MATHEMATICA	`R[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Clear[a]; a[0]=0; a[1]=0; a[2]=1; a [n_]:=a[n]=R[a[n-1]]+a[n-2]+a[n-3]; Table[a[n], {n, 0, 40}]`
	CROSSREFS	`Cf. A102111-A102125.` `Sequence in context: A103104 A103480 A024826 this_sequence A102115 A102116 A102117` `Adjacent sequences: A102111 A102112 A102113 this_sequence A102115 A102116 A102117`
	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 26 13:41 EDT 2008. Contains 142293 sequences.

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