id:A116437 - OEIS Search Results

Search: id:A116437

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Numbers n which when sandwiched between two 2's give a multiple of n.

+0
2

1, 2, 11, 13, 14, 22, 26, 77, 91, 137, 146, 274, 9091, 19802, 909091, 5882353, 10989011, 12987013, 13986014, 15037594, 21978022, 25974026, 52631579, 76923077, 90909091, 198019802, 1652892562, 4347826087, 8695652174 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`77 belongs since 2772 is a multiple of 77 (77*36).`
	MATHEMATICA	`f[k_, d_] := Flatten@Table[Select[Divisors[k(10^(i + 1) + 1)], IntegerLength[ # ] == i &], {i, d}]; f[2, 10] (Chandler*)`
	CROSSREFS	`Cf. A116436-A116444.` `Sequence in context: A037091 A127303 A068972 this_sequence A048867 A113626 A137238` `Adjacent sequences: A116434 A116435 A116436 this_sequence A116438 A116439 A116440`
	KEYWORD	`base,nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 15 2006`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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