A054738 Squares which can be split into two nonzero squares (perhaps with leading zeros) in exactly two different ways.

64009, 1600225, 4950625, 6400900, 40005625, 160022500, 324900625, 360050625, 495062500, 624100324, 640090000, 1000140625, 4000562500, 9001265625, 16002250000, 25003515625, 32490062500, 36005062500, 49006890625, 49506250000, 62410032400, 64009000000

Offset

0,1

Links

Table of n, a(n) for n=0..21.

Formula

a(n) = A054737(n)^2. - Sean A. Irvine, Feb 20 2022

Example

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

Crossrefs

Cf. A039686.

Sequence in context: A182089 A217126 A250823 * A250617 A031859 A182811

Adjacent sequences: A054735 A054736 A054737 * A054739 A054740 A054741

Keyword

base,nonn

Author

Henry Bottomley, Apr 26 2000

Extensions

More terms from Sean A. Irvine, Feb 20 2022

Status

approved