A130289 - OEIS

A130289

Record values in A130280: minima of { m>1 | (2n+1)^2(m^2-1)+1 is a square} bigger than for all preceding n.

3, 5, 7, 11, 13, 19, 21, 29, 31, 169, 419, 461, 3269, 7127, 3877019, 22783559, 215308729

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OFFSET

1,1

COMMENTS

Most elements of this sequence seem to be 1,2 or 4 times a prime.

LINKS

PROG

(PARI) A130289( L=999, S=1 )={ local( R, T ); for( n=S, L, if( issquare(n) || R >= T = A130280(n), next ); print1( T ", " ); R=T )}

CROSSREFS

KEYWORD

nonn

AUTHOR

M. F. Hasler, May 24 2007

STATUS

approved