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A231900 Omit the 1s from first differences of A084663. 2
2, 7, 13, 5, 29, 3, 59, 3, 7, 5, 3, 131, 3, 263, 3, 17, 3, 5, 3, 19, 569, 3, 17, 3, 13, 7, 5, 3, 1181, 3, 17, 3, 2381, 3, 11, 3, 5, 3, 7, 4787, 3, 5, 3, 11, 3, 53, 3, 11, 3, 13, 19, 9689, 3, 19379, 3, 7, 5, 3, 137, 3, 13, 38921, 3, 17, 3, 7, 77867, 3, 5, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms greater than 1 in A134744.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..120

Eric S. Rowland, A simple prime-generating recurrence

MATHEMATICA

DeleteCases[Differences[RecurrenceTable[{a[1]==8, a[n]==a[n-1]+GCD[ a[n-1], n]}, a, {n, 100000}]], 1] (* Harvey P. Dale, Apr 12 2016 *)

PROG

(Haskell)

a231900 n = a231900_list !! (n-1)

a231900_list = filter (> 1) a134744_list

CROSSREFS

Cf. A137613.

Sequence in context: A230637 A301852 A103886 * A323740 A130710 A145300

Adjacent sequences:  A231897 A231898 A231899 * A231901 A231902 A231903

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 15 2013

STATUS

approved

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Last modified May 19 02:29 EDT 2019. Contains 323377 sequences. (Running on oeis4.)