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A048372 a(n)^3 is smallest cube containing exactly n 7's. 10
3, 26, 83, 173, 1983, 2953, 19753, 90643, 258999, 426859, 4255753, 13955253, 42111153, 92356426, 425851173, 878398753, 9197190176, 9196397753, 89494606688, 390974932563, 918856391641, 4250703842293 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Cubic Number
MATHEMATICA
a[n_] := Module[{i = 0}, While[DigitCount[i^3][[7]] != n, i++ ]; i]; (* Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 27 2006 *)
CROSSREFS
Sequence in context: A354050 A177511 A294494 * A269342 A292001 A211622
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Mar 15 1999
EXTENSIONS
a(14) from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 27 2006
a(15)-a(20) from Lars Blomberg, Jun 12 2011
a(21)-a(22) from Giovanni Resta, Jun 29 2018
STATUS
approved

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Last modified September 17 22:44 EDT 2024. Contains 375991 sequences. (Running on oeis4.)