id:A102121 - OEIS Search Results

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Iccanobirt numbers (11 of 15): a(n) = R(a(n-1) + R(a(n-2)) + R(a(n-3))), where R is the digit reversal function A004086.

+0
6

0, 0, 1, 1, 2, 4, 7, 31, 24, 44, 99, 581, 427, 117, 6201, 6367, 4018, 8621, 16342, 41752, 18376, 15486, 185801, 336123, 551315, 925189, 7799571, 5524929, 5346628, 6800461, 15116342, 36822052, 98232826, 48616741, 398264631, 406948574 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Digit reversal variation of Tribonacci numbers A000073.` `Inspired by Iccanobif numbers: A001129, A014258-A014260.`
	FORMULA	`a(n) = A004086(A102113(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]+R[a[n-2]]+R[a[n-3]]]; Table[a[n], {n, 0, 40}]`
	CROSSREFS	`Cf. A102111-A102125.` `Sequence in context: A047904 A102118 A102119 this_sequence A102120 A102122 A102123` `Adjacent sequences: A102118 A102119 A102120 this_sequence A102122 A102123 A102124`
	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 December 20 00:58 EST 2009. Contains 171054 sequences.

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