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A108570
Squares of lesser of twin primes.
6
9, 25, 121, 289, 841, 1681, 3481, 5041, 10201, 11449, 18769, 22201, 32041, 36481, 38809, 51529, 57121, 72361, 78961, 96721, 120409, 175561, 185761, 212521, 271441, 323761, 358801, 380689, 410881, 434281, 654481, 674041, 683929, 734449, 776161
OFFSET
1,1
COMMENTS
Squares of the form prime(n)*prime(n+1) - 2*prime(n).
LINKS
MAPLE
ZL:=[]:for p from 1 to 950 do if (isprime(p) and isprime(p+2)) then ZL:=[op(ZL), (p^2)]; fi; od; print(ZL); # Zerinvary Lajos, Mar 08 2007
MATHEMATICA
Select[First[#]Last[#]-2First[#]&/@Partition[Prime[Range[500]], 2, 1], IntegerQ[ Sqrt[#]]&] (* Harvey P. Dale, May 24 2011 *)
PROG
(PARI) p=2; forprime(q=3, , if(q-p==2, print1(p^2", ")); p=q) \\ Charles R Greathouse IV, Dec 16 2019
(Magma) [p^2 : p in PrimesUpTo(1100)| IsPrime(p+2)]; // Vincenzo Librandi, Dec 23 2019
CROSSREFS
Subsequence of A330477.
Sequence in context: A193644 A083100 A084058 * A092769 A263951 A139818
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Jul 05 2005
EXTENSIONS
Extended by Ray Chandler, Jul 10 2005
Name and comment swapped by Charles R Greathouse IV, Dec 16 2019
STATUS
approved