id:A053472 - OEIS Search Results

Search: id:A053472

Displaying 1-1 of 1 results found.

page 1

Cototient of n (A051953) iterated 4 times.

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 4, 0, 2, 0, 4, 0, 4, 0, 4, 0, 4, 0, 8, 0, 4, 1, 4, 0, 4, 0, 8, 0, 4, 0, 8, 0, 4, 1, 8, 0, 8, 0, 4, 1, 4, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 16, 0, 8, 1, 12, 0, 16, 1, 8, 0, 8, 0, 16, 0, 8, 0, 8, 0, 8, 0, 8, 1, 16, 0, 16 (list; graph; listen)

	OFFSET	`1,18`
	COMMENT	`As iteration of A051953 progresses, powers of 2 may appear and it ends at 0 fixed point. Analogous 4th iterates for A000005 or A000010 are A036452 and A049100`
	EXAMPLE	`n=50, n_1=n-Phi[n]=50-20=30, n_2=n_1-Phi[n_1]=30-8=22, n_3=22-Phi[22]=12, n_4 = n_3-Phi[n_3]=12-4=8 so the 50th term is 8.`
	CROSSREFS	`A051953, A000005, A000010, A036452, A049100.` `Adjacent sequences: A053469 A053470 A053471 this_sequence A053473 A053474 A053475` `Sequence in context: A084099 A010673 A036665 this_sequence A036664 A045843 A096158`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jan 14 2000`

page 1

Search completed in 0.002 seconds

Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

AT&T Labs Research