A054737 Numbers n such that n^2 can be split into two nonzero squares (perhaps with leading zeros) in exactly two different ways.

253, 1265, 2225, 2530, 6325, 12650, 18025, 18975, 22250, 24982, 25300, 31625, 63250, 94875, 126500, 158125, 180250, 189750, 221375, 222500, 249820, 253000, 316250, 632500, 702247, 948750, 1265000, 1581250, 1802500, 1897500, 2213750, 2225000, 2498200, 2530000

Offset

1,1

Links

Table of n, a(n) for n=1..34.

Example

2225^2=4950625 can be split into 49=7^2 and 50625=225^2 or into 4=2^2 and 950625=975^2; 2530^2=6400900 can be split into 6400=80^2 and 900=30^2 or into 64=8^2 and 00900=30^2

Crossrefs

Cf. A048375, A054738.

Sequence in context: A203085 A245790 A070193 * A123013 A183449 A225021

Adjacent sequences: A054734 A054735 A054736 * A054738 A054739 A054740

Keyword

base,nonn

Author

Henry Bottomley, Apr 26 2000

Extensions

More terms from Sean A. Irvine, Feb 20 2022

Status

approved