A067477 Smallest n-digit square starting with 7.

729, 7056, 70225, 700569, 7001316, 70006689, 700025764, 7000166889, 70000459776, 700001628921, 7000003645504, 70000012293201, 700000047060196, 7000000057996009, 70000000472817424, 700000000779640729

Offset: 3

Author

Amarnath Murthy, Feb 09 2002

Keywords

• base
• easy
• nonn

Crossrefs

Cf. A035074 (roots), A067472-A067479 (2..9).

Programs

PARI

for(n=3,22,a=ceil(sqrt(7*10^(n-1)))^2; print(a))

Formula

a(n) = ceiling(sqrt(7*10^(n-1)))^2, n>2. - Rick L. Shepherd, Feb 18 2002

Extensions

More terms from Rick L. Shepherd, Feb 18 2002