id:A108220 - OEIS Search Results

Search: id:A108220

Displaying 1-1 of 1 results found.

page 1

Numbers n such that concatenating n and the sum of factorials of the digits of n produces a square.

+0
1

3, 102, 122, 202, 1102, 15031, 244134, 244233, 434412, 495918, 1267396, 1300035, 1324340, 1635150, 3442657, 3878374, 5064314, 6175125, 6181308, 10320734, 10560355, 10586434, 10730603, 10804230, 11544642, 16224135, 17523855 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`495918 is in the sequence because 4!+9!+5!+9!+1!+8! = 766225 and` `495918766225 = 704215^2.`
	CROSSREFS	`Cf. A061602, A109016.` `Sequence in context: A069457 A142416 A110625 this_sequence A130733 A037062 A157549` `Adjacent sequences: A108217 A108218 A108219 this_sequence A108221 A108222 A108223`
	KEYWORD	`base,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jun 16 2005`
	EXTENSIONS	`Extended by Don Reble (djr(AT)nk.ca), Nov 21 2006`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research