id:A071966 - OEIS Search Results

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A071966

Composite numbers such that smallest prime factor, largest prime factor and sum of prime factors (with repetition) are all a sum of two squares.

+0
1

4, 16, 20, 25, 30, 32, 52, 65, 78, 80, 90, 130, 145, 148, 156, 164, 169, 174, 200, 238, 240, 244, 250, 256, 265, 270, 272, 286, 289, 290, 300, 306, 318, 320, 340, 348, 360, 388, 400, 408, 436, 442, 450, 452, 455, 464, 480, 481, 505, 512, 522, 540, 546, 574 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`481 is here since spf(481)= 13 = 2^2+3^2, lpf(481)= 37 = 1^2+6^2 and sopfr(481)= 50 = 1^2+7^2.`
	CROSSREFS	`Cf. A001481.` `Sequence in context: A077476 A146510 A032827 this_sequence A039943 A067671 A075331` `Adjacent sequences: A071963 A071964 A071965 this_sequence A071967 A071968 A071969`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jun 15 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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