id:A045547 - OEIS Search Results

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Numbers n such that final nonzero digit of n! is '2'.

+0
2

2, 5, 6, 8, 14, 19, 34, 35, 36, 38, 40, 41, 43, 47, 50, 51, 53, 62, 67, 74, 84, 85, 86, 88, 90, 91, 93, 97, 109, 110, 111, 113, 115, 116, 118, 122, 129, 132, 145, 146, 148, 150, 151, 153, 162, 167, 174, 177, 180, 181, 183, 189, 194, 200, 201, 203, 212, 217 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Index entries for sequences related to final digits of numbers`
	MATHEMATICA	`f[ n_Integer, m_Integer ] := (c = 0; p = 1; While[ d = Floor[ n/5^p ]; d > 0, c = c + d; p++ ]; Mod[ n!/10^c, m ] ); Select[ Range[ 250 ], f[ #, 10 ] == 2 & ]`
	CROSSREFS	`Sequence in context: A028787 A028796 A019989 this_sequence A127143 A079256 A097685` `Adjacent sequences: A045544 A045545 A045546 this_sequence A045548 A045549 A045550`
	KEYWORD	`nonn,base`
	AUTHOR	`Jeff Burch (gburch(AT)erols.com)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research