A077503 Smallest n-digit square beginning with n.

1, 25, 324, 4096, 50176, 600625, 7001316, 80013025, 900000000, 1000014129, 11000024161, 120000580921, 1300001310976, 14000004588964, 150000007007601, 1600000000000000, 17000000233634401, 180000000244436761

Offset

1,2

Links

Table of n, a(n) for n=1..18.

Formula

a(n) = ceiling(sqrt(n*10^d))^2 where d = n - digit(n), digit(n) = number of digits in n. - Ray Chandler, Aug 11 2003

Crossrefs

Cf. A000290, A048761, A055642, A087095.

Sequence in context: A161932 A162367 A263404 * A262054 A020275 A020233

Adjacent sequences: A077500 A077501 A077502 * A077504 A077505 A077506

Keyword

base,nonn

Author

Amarnath Murthy, Nov 08 2002

Extensions

More terms from Ray Chandler, Aug 11 2003

Status

approved