A226858 Numbers n such that there are six distinct triples (k, k+n, k+2n) of squares.

258594336000, 1034377344000, 2327349024000, 4137509376000, 6464858400000, 9309396096000, 12671122464000, 16550037504000, 20946141216000, 25859433600000

Offset

1,1

Comments

For the first 10 terms we have a(n) = n^2 * a(1). Are there any other primitive terms other than a(1)?

Links

Table of n, a(n) for n=1..10.

Example

These 6 triples have a common difference of 9309396096000: (579774^2, 3105726^2, 4353726^2), (781560^2, 3149640^2, 4385160^2), (2241720^2, 3786120^2, 4862520^2), (4187880^2, 5181480^2, 6013080^2), (9320040^2, 9806760^2, 10270440^2), and (10273140^2, 10716660^2, 11142540^2).

Crossrefs

Cf. A198387, A222154, A222155, A214155, A226954.

Sequence in context: A348800 A015432 A034618 * A216904 A015418 A271366

Adjacent sequences: A226855 A226856 A226857 * A226859 A226860 A226861

Keyword

nonn,more

Author

Zdenek Cervenka, Jun 20 2013

Status

approved