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A105401 a(n) is the final term of the n-th row of A106394. 3
1, 2, 3, 12, 30, 180, 395780, 56, 5339880, 18448242120, 1192281609186360, 180180, 393869810468558572779517216129800, 2914872400440, 2914872400440, 180026486640, 4193048661254917704240, 2640766128, 11832093494672880 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
It's interesting that some terms are so much smaller than their neighbors, like row 8 (1 1 2 5 56) and row 26 (1 1 1 2 3 48 3952 76271067 17451826907684400). - Joshua Zucker, May 11 2006
LINKS
MATHEMATICA
egyptFraction[f_] := Ceiling[1/Most[NestWhileList[# - 1/Ceiling[1/#] &, f, # != 0 &]]]; a[n_] := egyptFraction[HarmonicNumber[n]][[-1]]; Array[a, 20] (* Amiram Eldar, Apr 09 2022 *)
CROSSREFS
Sequence in context: A221510 A109489 A169636 * A325595 A256031 A073617
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, May 01 2005
EXTENSIONS
More terms from Joshua Zucker, May 11 2006
STATUS
approved

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)