id:A108655 - OEIS Search Results

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Primes that are sums of the squares of two semiprimes.

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97, 181, 241, 277, 421, 457, 541, 641, 661, 709, 757, 821, 1109, 1117, 1237, 1301, 1381, 1597, 1621, 1669, 1709, 1901, 2069, 2341, 2381, 2417, 2437, 2557, 2617, 2677, 2741, 2797, 3041, 3061, 3221, 3557, 3637, 3701, 3733, 3989, 4241, 4261, 4421, 4517 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Subsequence of A002144.` `a(n) = A074985(i) + A074985(j) for appropriate i and j.`
	EXAMPLE	`A000040(733) = 5557 = 81 + 5476 = (33)^2 + (237)^2 =` `A001358(3)^2 + A001358(25)^2 = A074985(3) + A074985(25),` `therefore 5557 is a term.`
	CROSSREFS	`Cf. A000404, A001358, A000290.` `Adjacent sequences: A108652 A108653 A108654 this_sequence A108656 A108657 A108658` `Sequence in context: A139500 A142094 A142212 this_sequence A107193 A142398 A133870`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 07 2005`

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Last modified October 15 09:18 EDT 2008. Contains 145015 sequences.

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