id:A059030 - OEIS Search Results

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Fourth main diagonal of A059026: a(n) = B(n+3,n) = lcm(n+3,n)/(n+3) + lcm(n+3,n)/n - 1 for all n >= 1.

+0
4

4, 6, 2, 10, 12, 4, 16, 18, 6, 22, 24, 8, 28, 30, 10, 34, 36, 12, 40, 42, 14, 46, 48, 16, 52, 54, 18, 58, 60, 20, 64, 66, 22, 70, 72, 24, 76, 78, 26, 82, 84, 28, 88, 90, 30, 94, 96, 32, 100, 102, 34, 106, 108, 36, 112, 114, 38, 118, 120, 40, 124, 126, 42, 130 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`G.f.: x(2x^3+2x^2+6x+4)/(1-x^3)^2.`
	MAPLE	`B := (n, m) -> lcm(n, m)/n + lcm(n, m)/m - 1: seq(B(m+3, m), m=1..90);`
	CROSSREFS	`Cf. A059026, A059029, A059031.` `Sequence in context: A074828 A159193 A118967 this_sequence A066984 A085595 A054222` `Adjacent sequences: A059027 A059028 A059029 this_sequence A059031 A059032 A059033`
	KEYWORD	`nonn,easy`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) Dec 15 2000`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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