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 A196443 a(n) = the sum of GCQ_A(n, k) for 1 <= k <= n (see definition in comments). 11
 0, 0, 2, 3, 9, 9, 20, 24, 32, 41, 54, 55, 77, 87, 100, 115, 135, 145, 170, 180, 205, 227, 252, 263, 298, 321, 346, 372, 405, 424, 464, 490, 523, 557, 592, 616, 665, 699, 736, 768, 819, 850, 902, 940, 983, 1031, 1080, 1113, 1174, 1219 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Definition of GCQ_A: The greatest common non-divisor of type A (GCQ_A) of two positive integers a and b (a<=b) is the largest positive non-divisor q of numbers a and b such that 1<=q<=a common to a and b; GCQ_A(a, b) = 0 if  no such c exists. GCQ_A(1, b) = GCQ_A(2, b) = 0 for b >=1. GCQ_A(a, b) = 0 or >= 2. LINKS EXAMPLE For n = 6, a(6) = 9 because GCQ_A(6, 1) = 0, GCQ_A(6, 2) = 0, GCQ_A(6, 3) = 0, GCQ_A(6, 4) = 0, GCQ_A(6, 5) = 4, GCQ_A(6, 6) = 5. Sum of results is 9. CROSSREFS Cf. A196437, A196438, A196439, A196440, A196441, A196442, A196444, A018804. Cf. A199972 (the sum of GCQ_B(n, k) for 1<= k <= n). Cf. A199973 (the sum of LCQ_B(n, k) for 1 <= k <= n). Sequence in context: A092593 A231365 A024816 * A007316 A163905 A235499 Adjacent sequences:  A196440 A196441 A196442 * A196444 A196445 A196446 KEYWORD nonn AUTHOR Jaroslav Krizek, Nov 26 2011 STATUS approved

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Last modified February 20 06:26 EST 2019. Contains 320332 sequences. (Running on oeis4.)