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A065732
Largest square <= 2^n.
2
1, 4, 4, 16, 25, 64, 121, 256, 484, 1024, 2025, 4096, 8100, 16384, 32761, 65536, 131044, 262144, 524176, 1048576, 2096704, 4194304, 8386816, 16777216, 33547264, 67108864, 134212225, 268435456, 536848900, 1073741824, 2147395600
OFFSET
1,2
LINKS
FORMULA
a(n) = A048760(A000079(n)) = A048760(2^n).
MATHEMATICA
Table[Floor[Sqrt[2^w]//N]^2, {w, 1, 50}]
PROG
(PARI) { for (n=1, 200, a=sqrtint(2^n)^2; write("b065732.txt", n, " ", a) ) } \\ Harry J. Smith, Oct 28 2009
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Labos Elemer, Nov 15 2001
STATUS
approved