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A004924
a(n) = floor(n*phi^9), where phi is the golden ratio, A001622.
20
0, 76, 152, 228, 304, 380, 456, 532, 608, 684, 760, 836, 912, 988, 1064, 1140, 1216, 1292, 1368, 1444, 1520, 1596, 1672, 1748, 1824, 1900, 1976, 2052, 2128, 2204, 2280, 2356, 2432, 2508, 2584, 2660, 2736
OFFSET
0,2
COMMENTS
The first differences a(n) - a(n-1) generally equal 76 with exceptions for example at n = 77, 153, 229, 305, 381, 457, ..., 5777, 5854, 5930, .... where they equal 77. - R. J. Mathar, Jan 11 2008
MATHEMATICA
Floor[GoldenRatio^9*Range[0, 60]] (* G. C. Greubel, Aug 24 2023 *)
PROG
(Magma) [Floor((38+17*Sqrt(5))*n): n in [0..60]]; // G. C. Greubel, Aug 24 2023
(SageMath) [floor(golden_ratio^9*n) for n in range(61)] # G. C. Greubel, Aug 24 2023
KEYWORD
nonn
STATUS
approved