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A116287 Numbers k such that k*(k+3) gives the concatenation of a number m with itself. 5
8, 98, 767, 858, 910, 998, 3285, 6713, 9998, 45452, 54546, 99998, 990100, 999998, 8181819, 9999998, 70588233, 99999998, 343130554, 362637363, 363636361, 420053631, 421052632, 497975709, 502024289, 578947366, 579946367 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..27.

CROSSREFS

Cf. A116130, A116280, A116286, A116288, A116296.

Sequence in context: A302527 A303409 A264168 * A290242 A116229 A099150

Adjacent sequences:  A116284 A116285 A116286 * A116288 A116289 A116290

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified July 6 12:26 EDT 2022. Contains 355110 sequences. (Running on oeis4.)