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A116307
Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+3.
4
83, 77394229, 89158935, 36623663376237623663376337, 37633762366336633762366237, 62366237633663366237633763, 63376336623762376336623663, 86194223018927804587702130
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
89158935 * 89158936 = 79493157//79493160, where // denotes concatenation.
CROSSREFS
Cf.
A116099
,
A116301
,
A116308
,
A116314
.
Sequence in context:
A116263
A287686
A087532
*
A093676
A221416
A130432
Adjacent sequences:
A116304
A116305
A116306
*
A116308
A116309
A116310
KEYWORD
nonn
,
base
AUTHOR
Giovanni Resta
, Feb 06 2006
STATUS
approved
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Last modified August 12 13:41 EDT 2024. Contains 375113 sequences. (Running on oeis4.)