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A116268
Numbers k such that k*(k+5) gives the concatenation of two numbers m and m-3.
5
81, 77394227, 89158933, 36623663376237623663376335, 37633762366336633762366235, 62366237633663366237633761, 63376336623762376336623661, 86194223018927804587702128
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
89158933 * 89158938 = 79493157//79493154, where // denotes concatenation.
CROSSREFS
Cf.
A028557
,
A116099
,
A116261
,
A116267
,
A116269
,
A116276
.
Sequence in context:
A277844
A162284
A309110
*
A128838
A231484
A340398
Adjacent sequences:
A116265
A116266
A116267
*
A116269
A116270
A116271
KEYWORD
nonn
,
base
AUTHOR
Giovanni Resta
, Feb 06 2006
STATUS
approved
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Last modified September 3 16:57 EDT 2024. Contains 375672 sequences. (Running on oeis4.)