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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

Table of n, a(n) for n=1..10.

PROG

(Haskell)

a255678 n = head $ filter ((== n) . a118668) [0..]

CROSSREFS

Cf. A118668.

Sequence in context: A005775 A094688 A068092 * A153480 A229007 A232060

Adjacent sequences:  A255675 A255676 A255677 * A255679 A255680 A255681

KEYWORD

nonn,base,fini,full

AUTHOR

Reinhard Zumkeller, Jul 11 2015

STATUS

approved

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Last modified February 19 18:22 EST 2019. Contains 320327 sequences. (Running on oeis4.)