id:A097155 - OEIS Search Results

Search: id:A097155

Displaying 1-1 of 1 results found.

page 1

Numbers that reach the fixed point 89 under iteration of f(x) = reverse(x) - maxdigit(x).

+0
6

89, 890, 998, 2125, 3126, 5207, 6207, 7018, 7019, 8099, 8900, 9098, 9899, 9980, 10151, 1015, 2, 10224, 12205, 12259, 12268, 14085, 14086, 15095, 15096, 17972, 18971, 21250, 22015, 2226, 9, 23077, 24005, 24086, 24087, 25096, 26963, 27962 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`89 is the first number that will not reach zero under iteration of f(x) = reverse(x) - maxdigit(x), since 98-9=89. It is conjectured that 0 and 89 are the only fixed points of f.`
	EXAMPLE	`a(5)=3126 because 3126 -> 6207 -> 7019 -> 9098 -> 8900 -> 89.`
	CROSSREFS	`Cf. A097153, A097154, A097156, A097157, A097158.` `Sequence in context: A069764 A053580 A103548 this_sequence A158716 A093289 A103545` `Adjacent sequences: A097152 A097153 A097154 this_sequence A097156 A097157 A097158`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Aug 01 2004`

page 1

Search completed in 0.002 seconds

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research