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A255678 Smallest number m needing exactly n distinct digits in decimal representation of m*(m+1)/2. 3
0, 4, 14, 45, 143, 452, 1431, 4549, 14334, 46097 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
A118668(a(n)) = n and A118668(m) <> n for m < a(n).
LINKS
PROG
(Haskell)
a255678 n = head $ filter ((== n) . a118668) [0..]
CROSSREFS
Cf. A118668, A260214 (the resulting triangular numbers).
Sequence in context: A005775 A094688 A068092 * A153480 A229007 A232060
KEYWORD
nonn,base,fini,full
AUTHOR
Reinhard Zumkeller, Jul 11 2015
STATUS
approved

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)