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A085809 Indices of semiprimes where largest gap occurs. Or, positions of records in A065516. 7
1, 2, 4, 6, 10, 34, 186, 422, 760, 1765, 4112, 4585, 8112, 8650, 8861, 75150, 223993, 327048, 712605, 1135940, 23958638, 42367759, 47848742, 54626559, 121984495, 157877985, 413509327, 798321315, 983679985, 1277946119, 2403158480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A215231(n) = A065516(a(n)). - Reinhard Zumkeller, Mar 23 2014

LINKS

Table of n, a(n) for n=1..31.

PROG

(PARI) {sgr(m)=local(a, b, rec, c); c=0; a=0; b=4; rec=0; for(n=5, m, if(bigomega(n)==2, c++; a=n; if(a-b>rec, rec=a-b; print1(c", "); b=a, b=a; )))}

(Haskell)

a085809 n = a085809_list !! (n-1)

-- See A215231 for definition of a085809_list.

-- Reinhard Zumkeller, Mar 23 2014

CROSSREFS

Cf. A239674.

Sequence in context: A005194 A171447 A207667 * A073308 A058960 A036053

Adjacent sequences:  A085806 A085807 A085808 * A085810 A085811 A085812

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 24 2003

EXTENSIONS

a(19)-a(26) from Donovan Johnson, Jan 28 2009

a(27)-a(31) from Donovan Johnson, Apr 14 2010

STATUS

approved

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Last modified April 25 18:12 EDT 2019. Contains 322461 sequences. (Running on oeis4.)