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 A018124 Powers of fifth root of 4 rounded to nearest integer. 1
 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 37, 49, 64, 84, 111, 147, 194, 256, 338, 446, 588, 776, 1024, 1351, 1783, 2353, 3104, 4096, 5405, 7132, 9410, 12417, 16384, 21619, 28526, 37641, 49667, 65536, 86475 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Table of n, a(n) for n=0..41. PROG (Python) from gmpy2 import iroot_rem def A018124(n): i, j = iroot_rem(1<<(n<<1), 5) return int(i)+int(j<<5>=10*i*((i*((i*(i+1)<<1)+1)<<2)+1)+1) # Chai Wah Wu, Jun 20 2024 CROSSREFS Cf. A005533. Sequence in context: A369571 A274200 A018052 * A124745 A133034 A000931 Adjacent sequences: A018121 A018122 A018123 * A018125 A018126 A018127 KEYWORD nonn AUTHOR N. J. A. Sloane. STATUS approved

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Last modified July 13 00:23 EDT 2024. Contains 374259 sequences. (Running on oeis4.)