A166708 Squares in A105720.

36, 169, 247590225

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