id:A079550 - OEIS Search Results

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Array T(m,n) = phi(m^2)*phi(n^2) - phi(m*n)^2 (m,n >= 1), read by antidiagonals.

+0
4

0, 1, 1, 2, 0, 2, 4, 8, 8, 4, 4, 0, 0, 0, 4, 8, 24, 32, 32, 24, 8, 6, 8, 56, 0, 56, 8, 6, 16, 48, 36, 96, 96, 36, 48, 16, 18, 0, 108, 32, 0, 32, 108, 0, 18, 24, 72, 128, 192, 176, 176, 192, 128, 72, 24, 10, 16, 0, 0, 264, 0, 264, 0, 0, 16, 10, 32, 120, 176, 288, 384, 360, 360, 384, 288 (list; table; graph; listen)

	OFFSET	`1,4`
	COMMENT	`It is known that phi(m^2)phi(n^2) >= phi(mn)^2.`
	REFERENCES	`D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 9.`
	CROSSREFS	`Cf. A000010, A076953, A079548, A079549.` `Sequence in context: A078023 A077484 A058210 this_sequence A067648 A052438 A158855` `Adjacent sequences: A079547 A079548 A079549 this_sequence A079551 A079552 A079553`
	KEYWORD	`nonn,tabl`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jan 24 2003`

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

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