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Numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 9.

4

`%I #7 Jul 18 2021 02:50:23
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`%S 122,424,694,778,878,11012,17872,33322,44644,100127651905364,
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`%T 102071005406644,107985753493528,110694523108262,115328750502614,
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`%U 120698923758154,126650002778762,137336087431654,147311014912628
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`%N Numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 9.
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`%e 44644//44652 = 66812 * 66821, where // denotes concatenation.
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`%Y Cf. A116211, A116215, A116224, A116347.
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`%K nonn,base
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`%O 1,1
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`%A _Giovanni Resta_, Feb 06 2006
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