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A116297 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+1. 5
2, 5, 43, 54, 38161, 61836, 83616, 346978, 653019, 950049, 8647553, 9534263, 8167822281, 9007920990, 9209900790, 9950000499, 4737445289219, 4990568257185, 5009431742812, 5262554710778, 8373808925583 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

CROSSREFS

Cf. A115428, A116288, A116296, A116298, A116317.

Sequence in context: A246669 A208302 A273398 * A215170 A286871 A027730

Adjacent sequences:  A116294 A116295 A116296 * A116298 A116299 A116300

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified September 16 23:53 EDT 2021. Contains 347477 sequences. (Running on oeis4.)