A103390 Natural numbers but with nonprimes squared.

0, 1, 2, 3, 16, 5, 36, 7, 64, 81, 100, 11, 144, 13, 196, 225, 256, 17, 324, 19, 400, 441, 484, 23, 576, 625, 676, 729, 784, 29, 900, 31, 1024, 1089, 1156, 1225, 1296, 37, 1444, 1521, 1600, 41, 1764, 43, 1936, 2025, 2116, 47, 2304, 2401, 2500, 2601, 2704, 53

Offset

1,3

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Peter Alfeld, The 1,000 smallest prime numbers .

Example

4 is not a prime, so it is squared.

Mathematica

Table[ If[ PrimeQ[n], n, n^2], {n, 0, 54}] (* Robert G. Wilson v, Mar 24 2005 *)

Crossrefs

Cf. A103164.

Sequence in context: A190116 A088447 A326578 * A167761 A364813 A176029

Adjacent sequences: A103387 A103388 A103389 * A103391 A103392 A103393

Keyword

easy,nonn

Author

Parthasarathy Nambi, Mar 20 2005

Extensions

More terms from Robert G. Wilson v, Mar 24 2005

Status

approved