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A087913 Greatest number less than n such that the number of prime factors is one less than that of n; a(1)=0. 0
0, 1, 1, 3, 1, 5, 1, 6, 7, 7, 1, 10, 1, 13, 13, 12, 1, 15, 1, 15, 19, 19, 1, 20, 23, 23, 26, 26, 1, 26, 1, 24, 31, 31, 31, 30, 1, 37, 37, 30, 1, 39, 1, 39, 39, 43, 1, 40, 47, 49, 47, 51, 1, 52, 53, 52, 53, 53, 1, 52, 1, 61, 62, 48, 61, 65, 1, 65, 67, 69, 1, 60, 1, 73, 74, 74, 73 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

A001222(a(n)) = A001222(n) - 1 for n>1.

LINKS

Table of n, a(n) for n=1..77.

CROSSREFS

Cf. A079890.

Sequence in context: A333976 A129510 A225656 * A090585 A309391 A147661

Adjacent sequences:  A087910 A087911 A087912 * A087914 A087915 A087916

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 26 2003

STATUS

approved

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Last modified May 24 14:36 EDT 2022. Contains 354037 sequences. (Running on oeis4.)