A011757 a(n) = prime(n^2).

2, 7, 23, 53, 97, 151, 227, 311, 419, 541, 661, 827, 1009, 1193, 1427, 1619, 1879, 2143, 2437, 2741, 3083, 3461, 3803, 4211, 4637, 5051, 5519, 6007, 6481, 6997, 7573, 8161, 8737, 9341, 9931, 10627, 11321, 12049, 12743, 13499, 14327, 15101, 15877, 16747, 17609, 18461

Offset

1,1

Links

David A. Corneth, Table of n, a(n) for n = 1..20000 (first 1000 terms from Zak Seidov)

Formula

a(n) = n^2 log^2 n + O(n^2 log n log log n). - Charles R Greathouse IV, Mar 11 2014

Example

a(4) = 53 as the (4^2)th prime is the 16th prime is 53. - David A. Corneth, Apr 13 2021

Mathematica

Prime[Range[40]^2] (* Alonso del Arte, Feb 11 2015 *)

Prog

(Magma) [NthPrime(n^2): n in [1..100] ]; // Vincenzo Librandi, Apr 12 2011
(PARI) a(n)=prime(n^2) \\ Charles R Greathouse IV, Jul 02 2013
(PARI) first(n) = { my(res = vector(n), t = 0); forprime(p = 2, oo, t++; if(ispower(t, 2, &i), print1([i, p]", "); res[i] = p; if(i >= n, return(res)))) } \\ David A. Corneth, Apr 13 2021

Crossrefs

Cf. A000040, A000290, A063076.

Sequence in context: A247197 A195629 A323526 * A121963 A041159 A210109

Adjacent sequences: A011754 A011755 A011756 * A011758 A011759 A011760

Keyword

nonn,easy

Author

Jeff Burch

Status

approved