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A097847 Triangle read by rows: T(n,k) = minimal number of terms needed to write k/n (for 1 <= k <= n) as a sum of unit fractions. 7
1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 1, 1, 2, 3, 2, 3, 3, 1, 1, 1, 2, 1, 2, 2, 3, 1, 1, 2, 1, 2, 2, 2, 3, 3, 1, 1, 1, 2, 2, 1, 2, 2, 3, 3, 1, 1, 2, 2, 2, 3, 2, 3, 4, 4, 4, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 3, 1, 1, 2, 3, 3, 3, 3, 2, 3, 3, 3, 3, 4, 1, 1, 1, 2, 2, 2, 3, 1, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..99.

Index entries for sequences related to Egyptian fractions

EXAMPLE

Triangle begins:

1

1 1

1 2 1

1 1 2 1

1 2 2 3 1

1 1 1 2 2 1

1 2 3 2 3 3 1

1 1 2 1 2 2 3 1

1 2 1 2 2 2 3 3 1

1 1 2 2 1 2 2 3 3 1

1 2 2 2 3 2 3 4 4 4 1

CROSSREFS

Cf. A097848, A097849.

Row sums give A270429.

Sequence in context: A174541 A029444 A122191 * A275120 A144379 A296772

Adjacent sequences:  A097844 A097845 A097846 * A097848 A097849 A097850

KEYWORD

nonn,tabl

AUTHOR

Franklin T. Adams-Watters, Aug 31 2004

STATUS

approved

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Last modified October 23 14:11 EDT 2019. Contains 328345 sequences. (Running on oeis4.)