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A062974 omega[n+1] < 2*omega[n], where omega[n] is the number of distinct prime divisors of n. 2
2, 3, 4, 6, 7, 8, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 28, 30, 31, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A001221(a(n)+1) < 2*A001221(a(n)).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(PARI) j=[]; for(n=1, 200, if(omega(n+1)<2*omega(n), j=concat(j, n))); j

(Haskell)

import Data.List (findIndices)

a062974 n = a062974_list !! (n-1)

a062974_list = map (+ 1) $ findIndices (< 0) $

   zipWith (-) (tail a001221_list) $ map (* 2) a001221_list

-- Reinhard Zumkeller, Jan 22 2013

CROSSREFS

Cf. A006049 (subsequence).

Sequence in context: A114149 A294652 A320143 * A329399 A329396 A328595

Adjacent sequences:  A062971 A062972 A062973 * A062975 A062976 A062977

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 26 2001

STATUS

approved

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Last modified August 14 19:47 EDT 2020. Contains 336483 sequences. (Running on oeis4.)