id:A109214 - OEIS Search Results

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Product of a(n-1) and digit reversal of a(n-2).

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1, 2, 2, 4, 8, 32, 256, 5888, 3838976, 34109301760, 231888097227054080, 1556059601911449331359933440, 125186119679477750610733678211850458005934080 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Cf. A000301 a(n) = a(n-1)a(n-2), A004086 R(n) = digit reversal of n, A109213 a(n) = a(n-2)R(a(n-1)).`
	FORMULA	`a(n)=a(n-1)*R(a(n-2)).`
	MATHEMATICA	`a[1]=1; a[2]=2; a[n_]:=a[n]=a[n-1]*FromDigits[Reverse[IntegerDigits[a[n-2]]]]; A109214=Table[a[n], {n, 13}]`
	CROSSREFS	`Cf. A000301, A004086, A109213.` `Sequence in context: A100799 A070323 A109213 this_sequence A000301 A124439 A082836` `Adjacent sequences: A109211 A109212 A109213 this_sequence A109215 A109216 A109217`
	KEYWORD	`base,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 22 2005`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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