A130288 Record indices of A130280: integers n>0 for which min{ m>1 | (2n+1)^2(m^2-1)+1 is a square} < oo but bigger than for all preceding n.

1, 2, 11, 14, 18, 23, 27, 34, 38, 44, 54, 59, 74, 158, 179, 284, 524

Offset

1,2

Comments

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

Corresponding values of A130280 are given in A130289. - M. F. Hasler, May 24 2007

Links

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

Prog

(PARI) A130288(L=999, S=1)={local(R, T); for(n=S, L, if(issquare(n) || R>=T=A130280(n), next); print1(n", "); R=T)}

Crossrefs

Cf. A084702, A130280, A130283, A130284, A130289.

Sequence in context: A041971 A299531 A106660 * A287395 A031192 A283930

Adjacent sequences: A130285 A130286 A130287 * A130289 A130290 A130291

Keyword

nonn

Author

M. F. Hasler, May 24 2007

Status

approved