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A166708 Squares in A105720. 0
36, 169, 247590225 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

36=6^2=A105720(3),

169=13^2=A105720(6),

247590225=15735^2=A105720(4072)

No more terms up to 35746494200563714=A105720(34769014).

MATHEMATICA

a=5; Do[a=a-Prime[n]+Prime[2n+1]+Prime[2n+2]; If[IntegerQ[Sqrt[a]], Print[{a, n+1 }]], {n, 1, 10^8}];

CROSSREFS

Cf. A105720, A166619, A166620.

Sequence in context: A017054 A231972 A330770 * A211731 A211742 A211751

Adjacent sequences:  A166705 A166706 A166707 * A166709 A166710 A166711

KEYWORD

more,nonn,bref

AUTHOR

Zak Seidov, Oct 18 2009

STATUS

approved

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Last modified May 18 10:19 EDT 2021. Contains 343995 sequences. (Running on oeis4.)