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A018157
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Powers of fifth root of 15 rounded to nearest integer.
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1
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1, 2, 3, 5, 9, 15, 26, 44, 76, 131, 225, 387, 665, 1142, 1964, 3375, 5801, 9970, 17137, 29454, 50625, 87013, 149555, 257051, 441813, 759375, 1305192, 2243328, 3855769, 6627188, 11390625, 19577886, 33649922
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Round[(15^(1/5))^Range[0, 50]] (* Paolo Xausa, Jul 01 2024 *)
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PROG
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(Python)
from gmpy2 import iroot_rem
i, j = iroot_rem(15**n, 5)
return int(i)+int(j<<5>=10*i*((i*((i*(i+1)<<1)+1)<<2)+1)+1) # Chai Wah Wu, Jun 20 2024
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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