OFFSET
1,1
COMMENTS
Another version of A007350.
J. E. Littlewood (1914) proved that this sequence is infinite.
a(1) = 26861 was found in 1957 by John Leech.
Prime indices of negative terms in A066520. - Jianing Song, Feb 20 2019
REFERENCES
Wacław Sierpiński, O stu prostych, ale trudnych zagadnieniach arytmetyki. Warsaw: PZWS, 1959, p. 22.
LINKS
Arkadiusz Wesolowski, Table of n, a(n) for n = 1..1000
G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 26861
FORMULA
a(n) = prime(A096628(n)). - Jianing Song, Feb 20 2019
MATHEMATICA
lst = {}; For[n = 2; t = 0, n < 50451, n++, t += Mod[p = Prime[n], 4] - 2; If[t < 0, AppendTo[lst, p]]]; lst
CROSSREFS
KEYWORD
nonn
AUTHOR
Arkadiusz Wesolowski, Dec 09 2011
STATUS
approved