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 A092889 Third component of quadruples a,b,c,d such that a < b < c < d, (a*b*c) mod (a+b+c) = d, (a*b*d) mod (a+b+d) = c, (a*c*d) mod (a+c+d) = b, (b*c*d) mod (b+c+d) = a. The quadruples are ordered according to sum of first three components, secondary by first component, thirdly by second component. 4
 40, 97, 128, 88, 96, 142, 151, 164, 238, 237, 189, 184, 174, 212, 304, 295, 268, 256, 350, 279, 350, 320, 374, 308, 443, 328, 475, 329, 290, 394, 416, 367, 470, 686, 517, 438, 585, 605, 640, 620, 572, 498, 736, 455, 435, 650, 502, 635, 625, 605, 846, 891 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Suggested by Thomas A. Nagy. - A092887 gives first component, A092888 gives second component, A092890 gives fourth component. LINKS EXAMPLE The fourth quadruple is 56, 63, 88, 171, hence a(4) = 88. PROG (PARI) {m=1110; for(n=6, m, for(a=1, (n-3)\3, for(b=a+1, (n-a-1)\2, c=n-a-b; d=a*b*c%(a+b+c); if(c

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