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 A183859 a(n) = n - 1 + ceiling((n^2)/3); complement of A183858. 1
 1, 3, 5, 9, 13, 17, 23, 29, 35, 43, 51, 59, 69, 79, 89, 101, 113, 125, 139, 153, 167, 183, 199, 215, 233, 251, 269, 289, 309, 329, 351, 373, 395, 419, 443, 467, 493, 519, 545, 573, 601, 629, 659, 689, 719, 751, 783, 815, 849, 883, 917, 953, 989, 1025, 1063, 1101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Index entries for linear recurrences with constant coefficients, signature (2,-1,1,-2,1). FORMULA a(n) = n - 1 + ceiling((n^2)/3). MATHEMATICA a=3; b=0; Table[n+Floor[(a*n+b)^(1/2)], {n, 100}] Table[n-1+Ceiling[(n*n-b)/a], {n, 80}] CROSSREFS Cf. A183858. Sequence in context: A196094 A063915 A340520 * A096228 A185170 A211340 Adjacent sequences: A183856 A183857 A183858 * A183860 A183861 A183862 KEYWORD nonn,easy AUTHOR Clark Kimberling, Jan 07 2011 STATUS approved

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Last modified December 4 02:16 EST 2022. Contains 358544 sequences. (Running on oeis4.)