A219542 Numbers n such that n^2 is a concatenation of 3 nonzero squares, leading zeros not allowed.

12, 21, 37, 44, 107, 108, 120, 129, 191, 204, 209, 210, 223, 306, 315, 342, 343, 345, 370, 408, 413, 440, 501, 642, 696, 804, 955, 959, 982, 995, 1002, 1044, 1063, 1065, 1070, 1080, 1107, 1169, 1200, 1275, 1281, 1290, 1301, 1306, 1315, 1349, 1385, 1503, 1910

Offset

1,1

Links

Zak Seidov, Table of n, a(n) for n = 1..1500

Example

a(1) = 12: 12^2 = 144, 1 = 1^2, 4 = 2^2, 4 = 2^2;
a(1500) = 3176900^2 = 100, 9, 2693610000, 100 = 10^2, 9 = 3^2, 2693610000 = 51900^2.

Crossrefs

Cf. A039686, A048375, A048646, A145848, A147608.

Sequence in context: A226186 A325301 A351478 * A354984 A367357 A137480

Adjacent sequences: A219539 A219540 A219541 * A219543 A219544 A219545

Keyword

nonn,base

Author

Zak Seidov, Nov 22 2012

Status

approved