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A116230
n times n+7 gives the concatenation of two numbers m and m-9.
4
80, 77394226, 89158932, 36623663376237623663376334, 37633762366336633762366234, 62366237633663366237633760, 63376336623762376336623660, 86194223018927804587702127
OFFSET
1,1
EXAMPLE
89158932 * 89158939 = 79493157//79493148, where // denotes
concatenation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved