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A116347 n times n+9 gives the concatenation of two numbers m and m+8. 4
345, 647, 829, 878, 933, 33180, 42271, 57721, 66812, 316429537030539, 319485532390187, 328611858418903, 332707864512186, 339600869407914, 347417506407134, 355879196889561, 370588838784509, 383811170906508 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

66812 * 66821 = 44644//44652, where // denotes concatenation.

CROSSREFS

Cf. A116216, A116342, A116346, A116355.

Sequence in context: A251812 A251811 A268145 * A063370 A095963 A247079

Adjacent sequences:  A116344 A116345 A116346 * A116348 A116349 A116350

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified September 21 07:06 EDT 2020. Contains 337267 sequences. (Running on oeis4.)