A231900 - OEIS

A231900

Omit the 1s from first differences of A084663.

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

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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 natural prime-generating recurrence, arXiv:0710.3217 [math.NT], 2007-2008.

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)