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A166447
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a(n) = n*round(sqrt(n)).
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3
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0, 1, 2, 6, 8, 10, 12, 21, 24, 27, 30, 33, 36, 52, 56, 60, 64, 68, 72, 76, 80, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 186, 192, 198, 204, 210, 216, 222, 228, 234, 240, 246, 252, 301, 308, 315, 322, 329, 336, 343, 350, 357, 364, 371, 378, 385, 392, 456
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listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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FORMULA
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MAPLE
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# second Maple program:
a:= n-> n*isqrt(n):
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MATHEMATICA
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PROG
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(Python)
from math import isqrt
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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