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A071191 Least m>n such that the number of prime factors of m and n differ at most by 1. 2
2, 3, 4, 5, 6, 7, 9, 9, 10, 11, 13, 14, 14, 15, 17, 18, 19, 20, 21, 21, 22, 23, 25, 27, 26, 27, 28, 30, 31, 33, 33, 36, 34, 35, 37, 40, 38, 39, 41, 42, 43, 44, 46, 45, 46, 47, 49, 54, 50, 51, 52, 54, 55, 56, 57, 60, 58, 59, 61, 63, 62, 63, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

abs(A001222(a(n)) - A001222(n)) <= 1.

LINKS

Table of n, a(n) for n=1..63.

CROSSREFS

Cf. A071193, A071192.

Sequence in context: A323785 A327626 A179464 * A300903 A097428 A126072

Adjacent sequences:  A071188 A071189 A071190 * A071192 A071193 A071194

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 15 2002

STATUS

approved

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Last modified August 11 15:12 EDT 2020. Contains 336428 sequences. (Running on oeis4.)