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A116343 Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+8. 4
14, 86, 76983, 714690, 952314, 90438191, 96320544, 32980078899029, 34346653774238, 42816188292273, 42881990066488, 57118009933512, 57183811707727, 65653346225762, 67019921100971, 81321742742210 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
96320544 * 96320545 = 92776472//92776480, where // denotes concatenation.
CROSSREFS
Sequence in context: A206614 A345107 A321941 * A259473 A202785 A255535
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified March 28 13:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)