|
| |
|
|
A089998
|
|
Smallest square with Hamming weight n (i.e. with exactly n 1's when written in binary).
|
|
3
| |
|
|
0, 1, 9, 25, 169, 121, 441, 1521, 2025, 5625, 24025, 47089, 109561, 32761, 393129, 851929, 1540081, 6275025, 15327225, 27258841, 41925625, 127893481, 243204025, 385611769, 998244025, 1979449081, 4823441401, 12870221809, 34324602361
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| A000120(a(n)) = n.
|
|
|
MATHEMATICA
| a = Table[0, {30}]; Do[c = Count[IntegerDigits[n^2, 2], 1]; If[ a[[c + 1]] == 0, a[[c + 1]] = n^2; Print[c, " = ", n^2]], {n, 1, 360000}] (from Robert G. Wilson v Dec 03 2003)
|
|
|
CROSSREFS
| Cf. A000290, A089999, A061712, A090001.
Sequence in context: A146373 A084605 A098773 * A014728 A018929 A051515
Adjacent sequences: A089995 A089996 A089997 * A089999 A090000 A090001
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 20 2003
|
|
|
EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 03 2003
|
| |
|
|
