id:A102125 - OEIS Search Results

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

+0
19

0, 0, 1, 1, 2, 4, 7, 31, 42, 44, 18, 941, 472, 405, 729, 5071, 6313, 8675, 90601, 31591, 9853, 11733, 31865, 31149, 736481, 365533, 313416, 3154311, 9834802, 5123383, 7112507, 12796921, 35055832, 19867834, 56610708, 906334841, 561210372 (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(A102117(n)).`
	MATHEMATICA	`R[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Clear[a]; a[0]=0; a[1]=0; a[2]=1; a [n_]:=a[n]=R[R[a[n-1]]+R[a[n-2]]+R[a[n-3]]]; Table[a[n], {n, 0, 40}]`
	CROSSREFS	`Cf. A102111-A102124.` `Sequence in context: A102120 A102122 A102123 this_sequence A102124 A082537 A004577` `Adjacent sequences: A102122 A102123 A102124 this_sequence A102126 A102127 A102128`
	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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