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A095866 Largest n-digit number - largest n-digit triangular number. 7
3, 8, 9, 129, 318, 1008, 2843, 8988, 38439, 121089, 42708, 88208, 2034819, 1749819, 2235879, 104271309, 447194784, 1234742858, 2234186964, 3266133123, 22172578524, 114481278033, 204796672749, 841526085621, 355055477499 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = 10^n - 1 - A095864(n).
MATHEMATICA
lndt[n_]:=Module[{c=Floor[(Sqrt[8*10^n+1]-1)/2]}, (c(c+1))/2]; Join[{3}, Table[ 10^n-1-lndt[n], {n, 2, 30}]] (* Harvey P. Dale, May 16 2017 *)
CROSSREFS
Sequence in context: A000927 A055513 A038226 * A067569 A127518 A176118
KEYWORD
base,easy,nonn
AUTHOR
Ray Chandler, Jun 28 2004
STATUS
approved

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)