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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. 2
3, 5, 7, 11, 13, 19, 21, 29, 31, 169, 419, 461, 3269, 7127, 3877019, 22783559, 215308729 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

Table of n, a(n) for n=1..17.

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

Cf. A084702, A130280, A130283, A130284, A130288.

Sequence in context: A287437 A126991 A264754 * A071329 A109358 A216285

Adjacent sequences:  A130286 A130287 A130288 * A130290 A130291 A130292

KEYWORD

nonn

AUTHOR

M. F. Hasler, May 24 2007

STATUS

approved

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Last modified October 27 12:08 EDT 2021. Contains 348276 sequences. (Running on oeis4.)