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 A084969 Multiples of 11 whose GCD's with 210 is 1. 5
 11, 121, 143, 187, 209, 253, 319, 341, 407, 451, 473, 517, 583, 649, 671, 737, 781, 803, 869, 913, 979, 1067, 1111, 1133, 1177, 1199, 1243, 1331, 1397, 1441, 1507, 1529, 1573, 1639, 1661, 1727, 1793, 1837, 1859, 1903, 1969, 1991, 2057, 2101, 2123, 2167 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Fifth row of A083140. LINKS Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1). FORMULA GCD( 11k, 210) = 1. G.f.: 11*x*(x^48 +10*x^47 +2*x^46 +4*x^45 +2*x^44 +4*x^43 +6*x^42 +2*x^41 +6*x^40 +4*x^39 +2*x^38 +4*x^37 +6*x^36 +6*x^35 +2*x^34 +6*x^33 +4*x^32 +2*x^31 +6*x^30 +4*x^29 +6*x^28 +8*x^27 +4*x^26 +2*x^25 +4*x^24 +2*x^23 +4*x^22 +8*x^21 +6*x^20 +4*x^19 +6*x^18 +2*x^17 +4*x^16 +6*x^15 +2*x^14 +6*x^13 +6*x^12 +4*x^11 +2*x^10 +4*x^9 +6*x^8 +2*x^7 +6*x^6 +4*x^5 +2*x^4 +4*x^3 +2*x^2 +10*x +1) / (x^49 -x^48 -x +1). - Colin Barker, Feb 22 2013 a(n) = a(n-48) + 2310 = a(n-1) + a(n-48) - a(n-49). - Charles R Greathouse IV, Nov 19 2014 lim a(n)/n = A038111(5)/A038110(5) = 48.125 as n goes to infinity. - Vladimir Shevelev, Jan 20 2015 MATHEMATICA 11Select[ Range[210], GCD[ #, 2*3*5*7] == 1 & ] Select[11*Range[0, 200], GCD[#, 210]==1&] (* Harvey P. Dale, Dec 23 2013 *) PROG (PARI) is(n)=gcd(n, 2310)==11 \\ Charles R Greathouse IV, Nov 19 2014 CROSSREFS Cf. A083140. Equals 11 * A008364. Sequence in context: A004190 A089707 A223391 * A045592 A045595 A228440 Adjacent sequences:  A084966 A084967 A084968 * A084970 A084971 A084972 KEYWORD nonn,easy AUTHOR Robert G. Wilson v, Jun 15 2003 STATUS approved

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