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A048538
Smallest oblong (promic) number containing exactly n 4's.
10
42, 4422, 46440, 464442, 44642442, 144444342, 40447444340, 2344449414440, 42794944444440, 443448440044440, 24442434644444460, 455758444444444440, 34444442714441644442, 44441704844441444442, 14444904404444444646450, 344407444483444494444942, 1244444414842444444444506
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Pronic Number
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1999
EXTENSIONS
a(13)-a(17) from Giovanni Resta, Oct 09 2019
STATUS
approved