id:A106747 - OEIS Search Results

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Replace the odd digits d of n by (d-1)/2 and even digits d by d/2.

+0
1

0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 30, 30, 31, 31, 32, 32 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Terms are repeated. Differs from A004526 and A021895 starting with a(11)=0, A004526(11)=A021895(11)=5.`
	MATHEMATICA	`a[n_]:=FromDigits[Map[If[Mod[ #, 2]==1, (#-1)/2, #/2]&, IntegerDigits[n]]]; Table[a[n], {n, 0, 100}]`
	CROSSREFS	`Cf. A004526, A021895, A107128, A107130.` `Sequence in context: A110676 A117171 A084054 this_sequence A083447 A059998 A036041` `Adjacent sequences: A106744 A106745 A106746 this_sequence A106748 A106749 A106750`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), May 12 2005`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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