id:A106562 - OEIS Search Results

Search: id:A106562

Displaying 1-1 of 1 results found.

page 1

Perfect squares which are not the sum of two primes.

+0
13

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; listen)

	OFFSET	`1,2`
	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: A083749 A023696 A038467 this_sequence A106573 A084306 A112075` `Adjacent sequences: A106559 A106560 A106561 this_sequence A106563 A106564 A106565`
	KEYWORD	`easy,nonn`
	AUTHOR	`Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), May 09 2005`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), May 12 2005`

page 1

Search completed in 0.002 seconds

Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

AT&T Labs Research