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A077725
a(n) = smallest square > 1 which can be expressed as a sum of distinct powers of n.
0
4, 4, 4, 25, 36, 49, 9, 9, 100, 121, 144, 169, 196, 16, 16, 289, 324, 361, 400, 441, 484, 529, 25, 25, 676, 729, 784, 841, 900, 961, 1024, 1089, 1156, 36, 36, 1369, 1444, 1521, 1600, 1681, 1764, 1849, 1936, 2025, 2116, 2209, 49, 49, 2500, 2601, 2704, 2809, 2916
OFFSET
2,1
COMMENTS
a(n) = smallest square whose base n representation contains only 0's and 1's.
FORMULA
a(1) = 4, a(k^2-1) = a(k^2) = k^2, a(n) = n^2 otherwise. - Charlie Neder, Mar 08 2019
CROSSREFS
Cf. A077724.
Sequence in context: A024949 A362374 A059812 * A217940 A353000 A372020
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Nov 19 2002
EXTENSIONS
Corrected and extended by Ray Chandler, Sep 04 2003
STATUS
approved