id:A063920 - OEIS Search Results

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t(n) = z(n) where t(n)= |eulerphi(n)-n| and z(n)= t(t(n)-n).

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10, 14, 20, 28, 40, 56, 80, 112, 160, 224, 320, 448, 640, 896, 1280, 1792, 2560, 3584, 5120, 7168, 10240, 14336, 20480, 28672, 40960, 57344, 81920, 114688, 163840, 229376, 327680, 458752, 655360, 917504, 1310720, 1835008 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`L. Sze, Conjecture 36`
	FORMULA	`G.f.: (10 + 14x)/(1 - 2x^2).`
	PROGRAM	`(PARI) t(n) = abs(eulerphi(n)-n); z(n) = t(t(n)-n); for(n=1, 113, if(t(n)==z(n), print(n)))`
	CROSSREFS	`Sequence in context: A073493 A162685 A031274 this_sequence A057487 A073486 A073487` `Adjacent sequences: A063917 A063918 A063919 this_sequence A063921 A063922 A063923`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Aug 31 2001`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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