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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 (list; graph; refs; listen; history; text; internal format)
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 August 7 10:19 EDT 2022. Contains 355985 sequences. (Running on oeis4.)