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 A155573 Intersection of A000404, A154777 and A092572: N = a^2 + b^2 = c^2 + 2d^2 = e^2 + 3f^2 for some positive integers a,b,c,d,e,f. 0
 73, 97, 193, 241, 292, 313, 337, 388, 409, 433, 457, 577, 601, 657, 673, 769, 772, 873, 900, 937, 964, 1009, 1033, 1129, 1153, 1156, 1168, 1201, 1249, 1252, 1297, 1321, 1348, 1489, 1521, 1552, 1609, 1636, 1657, 1732, 1737, 1753, 1777, 1801, 1825, 1828 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS PROG (PARI) isA155573(n, /* optional 2nd arg allows us to get other sequences */c=[3, 2, 1]) = { for(i=1, #c, for(b=1, sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2) & next(2)); return); 1} for( n=1, 1999, isA155573(n) & print1(n", ")) CROSSREFS Cf. A000404, A154777, A092572, A097268, A154778, A155716, A155717, A155560-A155578. Sequence in context: A168110 A139972 A268426 * A107008 A141375 A140621 Adjacent sequences:  A155570 A155571 A155572 * A155574 A155575 A155576 KEYWORD easy,nonn AUTHOR M. F. Hasler, Jan 25 2009 STATUS approved

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Last modified June 14 12:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)