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 A183873 n-1+ceiling((1/5)n^2); complement of A183872. 1
 1, 2, 4, 7, 9, 13, 16, 20, 25, 29, 35, 40, 46, 53, 59, 67, 74, 82, 91, 99, 109, 118, 128, 139, 149, 161, 172, 184, 197, 209, 223, 236, 250, 265, 279, 295, 310, 326, 343, 359, 377, 394, 412, 431, 449, 469, 488, 508, 529, 549, 571, 592, 614, 637, 659, 683, 706, 730, 755, 779, 805, 830, 856, 883, 909, 937, 964, 992, 1021, 1049, 1079, 1108, 1138, 1169, 1199, 1231, 1262, 1294, 1327, 1359 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..80. Index entries for linear recurrences with constant coefficients, signature (2,-1,0,0,1,-2,1). FORMULA G.f.: x*(x^2+1)*(x^4-x^3-1)/((x-1)^3*(x^4+x^3+x^2+x+1)). [Colin Barker, Oct 04 2012] MATHEMATICA a=5; b=0; Table[n+Floor[(a*n+b)^(1/2)], {n, 100}] Table[n-1+Ceiling[(n*n-b)/a], {n, 80}] CROSSREFS Cf. A183872. Sequence in context: A288933 A129259 A077597 * A036386 A280417 A099847 Adjacent sequences: A183870 A183871 A183872 * A183874 A183875 A183876 KEYWORD nonn,easy AUTHOR Clark Kimberling, Jan 07 2011 STATUS approved

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Last modified May 30 14:11 EDT 2023. Contains 363055 sequences. (Running on oeis4.)