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A027566 Number of numbers not of form k_1 k_2 .. k_n (1/k_1 + .. + 1/k_n), k_i >= 1. 4
1, 18, 126, 1652 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..5.

CROSSREFS

Cf. A025052, A027563, A027565, A027565.

Sequence in context: A056125 A223212 A297027 * A041620 A244879 A142965

Adjacent sequences:  A027563 A027564 A027565 * A027567 A027568 A027569

KEYWORD

nonn,hard,nice

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified November 17 21:19 EST 2018. Contains 317279 sequences. (Running on oeis4.)