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 A283769 Numbers k such that L(k) = 0 mod 3, where L = A000201 = lower Wythoff sequence. 3
 2, 4, 6, 8, 13, 15, 17, 19, 21, 26, 28, 30, 32, 39, 41, 43, 45, 52, 54, 56, 58, 65, 67, 69, 71, 78, 80, 82, 84, 89, 91, 93, 95, 97, 102, 104, 106, 108, 110, 115, 117, 119, 121, 128, 130, 132, 134, 141, 143, 145, 147, 154, 156, 158, 160, 167, 169, 171, 173 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequences A283769, A283770, A283771 partition the positive integers. LINKS Clark Kimberling, Table of n, a(n) for n = 1..10000 FORMULA a(n+1) - a(n) is in {2,5,7} for every n. MATHEMATICA r = GoldenRatio; z = 350; t = Table[Floor[n*r], {n, 1, z}]; u = Mod[t, 3]; Flatten[Position[u, 0]]  (* A283769 *) Flatten[Position[u, 1]]  (* A283770 *) Flatten[Position[u, 2]]  (* A283771 *) PROG (PARI) r = (1 + sqrt(5))/2; for(n=1, 351, if(floor(n*r)%3==0, print1(n, ", "))) \\ Indranil Ghosh, Mar 19 2017 (Python) import math from sympy import sqrt r = (1 + sqrt(5))/2 print [n for n in xrange (1, 351) if int(math.floor(n*r))%3==0] # Indranil Ghosh, Mar 19 2017 CROSSREFS Cf. A000201, A001622, A283770, A283771. Sequence in context: A187779 A086141 A067883 * A117117 A135109 A281615 Adjacent sequences:  A283766 A283767 A283768 * A283770 A283771 A283772 KEYWORD nonn,easy AUTHOR Clark Kimberling, Mar 18 2017 STATUS approved

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Last modified January 23 09:05 EST 2019. Contains 319378 sequences. (Running on oeis4.)