A104486 Smallest semiprime containing exactly n 0's.

10, 1003, 10001, 100001, 1000001, 10000001, 100000001, 1000000006, 10000000003, 100000000007, 1000000000007, 40000000000003, 200000000000005, 1000000000000003, 10000000000000003, 200000000000000006, 1000000000000000007, 10000000000000000001, 200000000000000000001

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Example

a(2) = 1003 because 1003 = 17 * 59 is the smallest semiprime containing exactly two 0's.

Crossrefs

Cf. A001358.

Sequence in context: A139101 A015482 A288582 * A098753 A276758 A066489

Adjacent sequences: A104483 A104484 A104485 * A104487 A104488 A104489

Keyword

base,nonn

Author

Shyam Sunder Gupta, Apr 24 2005

Extensions

More terms from Amiram Eldar, Aug 24 2020

Status

approved