

A103164


Integers but with the primes squared.


6



0, 1, 4, 9, 4, 25, 6, 49, 8, 9, 10, 121, 12, 169, 14, 15, 16, 289, 18, 361, 20, 21, 22, 529, 24, 25, 26, 27, 28, 841, 30, 961, 32, 33, 34, 35, 36, 1369, 38, 39, 40, 1681, 42, 1849, 44, 45, 46, 2209, 48, 49, 50, 51, 52, 2809, 54, 55, 56, 57, 58, 3481, 60, 3721, 62, 63, 64
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OFFSET

0,3


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..5000


FORMULA

a(n) = (n! mod n^2) + n, n>0, n != 4.  Gary Detlefs, Feb 21 2011


EXAMPLE

a(4) = 4 because 4 is composite.
a(5) = 25 because 5 is prime and 5^2 = 25.


MATHEMATICA

Table[ If[ !PrimeQ[n], n, n^2], {n, 0, 64}] (* Robert G. Wilson v, Mar 19 2005 *)


PROG

(MAGMA) [0] cat [IsPrime(n) select n^2 else n: n in [1..70]]; // Vincenzo Librandi, Feb 17 2017


CROSSREFS

Sequence in context: A340769 A088377 A066048 * A210966 A300516 A178147
Adjacent sequences: A103161 A103162 A103163 * A103165 A103166 A103167


KEYWORD

easy,nonn


AUTHOR

Parthasarathy Nambi, Mar 17 2005


EXTENSIONS

More terms from Robert G. Wilson v, Mar 19 2005


STATUS

approved



