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A116139
Numbers k such that k concatenated with k-3 gives the product of two numbers which differ by 8.
5
43, 20440836, 30017751, 61336887, 52400871197755334426147587, 53651708763838760619655612, 56652002793835820319625612, 57952296063256269823192087, 17684775866714240650923831481623
OFFSET
1,1
EXAMPLE
61336887//61336884 = 78317866 * 78317874, where // denotes concatenation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved