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 A039912 Triangle related to number of compositions of n into relatively prime summands. 5
 1, 1, -2, 1, -3, 4, 1, -4, 6, -8, 1, -5, 10, -9, 16, 1, -6, 15, -20, 9, -32, 1, -7, 21, -35, 36, 0, 64, 1, -8, 28, -56, 70, -64, -27, -128, 1, -9, 36, -84, 126, -125, 120, 81, 256, 1, -10, 45, -120, 210, -252, 200, -240, -162, -512, 1, -11, 55, -165, 330, -462, 463, -275, 496, 243, 1024, 1, -12, 66, -220, 495, -792, 924 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 2,3 LINKS H. W. Gould, Binomial coefficients, the bracket function and compositions with relatively prime summands, Fib. Quart. 2 (1964), 2. EXAMPLE Triangle begins:   1;   1, -2;   1, -3,  4;   1, -4,  6,  -8;   1, -5, 10,  -9, 16;   1, -6, 15, -20,  9, -32;   1, -7, 21, -35, 36,   0, 64;   ... CROSSREFS Cf. A126713. Sequence in context: A085643 A174829 A132110 * A163311 A210555 A008949 Adjacent sequences:  A039909 A039910 A039911 * A039913 A039914 A039915 KEYWORD tabl,sign AUTHOR EXTENSIONS More terms from Vladeta Jovovic, Feb 26 2008 STATUS approved

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Last modified October 15 13:38 EDT 2019. Contains 328030 sequences. (Running on oeis4.)