The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A106573 Perfect squares which are neither the sum nor the difference of two primes. 12
 121, 289, 529, 625, 961, 1681, 2601, 2809, 3481, 4225, 4489, 5329, 6241, 6889, 7225, 7569, 8281, 9025, 9409, 10201, 11881, 12769, 13225, 15625, 16641, 17689, 18769, 19881, 20449, 22201, 22801, 23409, 24649, 25281, 26569, 27225, 27889, 30625 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA A106547 with 0's removed. EXAMPLE a(2)=289 because it is the second perfect square which is impossible to obtain adding a prime to - or subtracting from - another one. 64 is not in the sequence because 64=67-3, a difference of two primes. CROSSREFS Cf. A106544-A106548, A106562-A106564, A106571, A106574, A106575, A106577. Sequence in context: A023696 A038467 A106562 * A084306 A254978 A254971 Adjacent sequences:  A106570 A106571 A106572 * A106574 A106575 A106576 KEYWORD easy,nonn AUTHOR Alexandre Wajnberg, May 09 2005 EXTENSIONS Corrected and extended by Ray Chandler, May 12 2005 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 13 00:57 EDT 2021. Contains 344980 sequences. (Running on oeis4.)