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 A106562 Perfect squares which are not the sum of two primes. 12
 1, 121, 289, 529, 625, 961, 1521, 1681, 2025, 2601, 2809, 3249, 3481, 4225, 4489, 5329, 6241, 6561, 6889, 7225, 7569, 8281, 9025, 9409, 9801, 10201, 11025, 11881, 12321, 12769, 13225, 15129, 15625, 16641, 17689, 18769, 19881, 20449, 21609 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA A106544 with 0's removed. EXAMPLE a(2)=121 because it is the second perfect square which is impossible to obtain summing two primes. 100 is not in the sequence because 100=97+3 (sum of two primes). CROSSREFS Cf. A106544-A106548, A106563-A106564, A106571, A106573-A106575, A106577. Sequence in context: A211468 A023696 A038467 * A106573 A084306 A254978 Adjacent sequences:  A106559 A106560 A106561 * A106563 A106564 A106565 KEYWORD easy,nonn AUTHOR Alexandre Wajnberg, May 09 2005 EXTENSIONS Extended by Ray Chandler, May 12 2005 STATUS approved

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