id:A049532 - OEIS Search Results

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a(n)^2+1 is not square-free.

+0
4

7, 18, 32, 38, 41, 43, 57, 68, 70, 82, 93, 99, 107, 117, 118, 132, 143, 157, 168, 182, 193, 207, 218, 232, 239, 243, 251, 257, 268, 282, 293, 307, 318, 327, 332, 343, 357, 368, 378, 382, 393, 407, 408, 418, 432, 437, 443, 457, 468, 482, 493, 500, 507, 515 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A059592(a(n) > 1; A124809(n) = a(n)^2 + 1. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 08 2006`
	EXAMPLE	`a(1)=7 and 7^2+1=49+1=50 is divided by 25, a square.`
	CROSSREFS	`Cf. A002522.` `Sequence in context: A061876 A103571 A103572 this_sequence A156619 A033537 A000566` `Adjacent sequences: A049529 A049530 A049531 this_sequence A049533 A049534 A049535`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu)`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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