id:A073636 - OEIS Search Results

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Digital root of n^3.

+0
2

1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Periodic with cycle {1,8,9}.` `a(n) is the decimal expansion of 44/37 [From Barbarel Tres Mil (barbarel3000(AT)yahoo.es), Jul 28 2009]`
	FORMULA	`a(n)=(1/3){14[n mod 3]+5*[(n+1) mod 3]-[(n+2) mod 3]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jun 08 2007`
	MATHEMATICA	`n=3; su[x_] := Sum[IntegerDigits[x][[i]], {i, Length[IntegerDigits[x]]}]; Table[su[su[su[su[x^n]]]], {x, 100}]`
	CROSSREFS	`Cf. A010888, A021596. Digital roots of squares are in A056992.` `Sequence in context: A154904 A155553 A053463 this_sequence A113521 A030167 A010767` `Adjacent sequences: A073633 A073634 A073635 this_sequence A073637 A073638 A073639`
	KEYWORD	`nonn,base`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 01 2002`

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

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