

A084733


Squares which are the sum of at least three successive terms of a geometric progression.


0



49, 121, 169, 196, 225, 400, 441, 484, 676, 784, 900, 961, 1089, 1225, 1521, 1600, 1764, 1849, 1936, 2025, 2401, 2704, 3025, 3136, 3249, 3600, 3844, 3969, 4225, 4356, 4900, 5329, 5625, 5929, 6084, 6400, 7056, 7225, 7396, 7744, 8100, 8281, 8649, 9604
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,1


COMMENTS

The partial sums of three or more successive terms of the sequence (2^n), 1,2,4,8,16,32,... is given by 7,14,15,28,30,31,...hence the square of the terms of this sequence are members. The same can be extended for any sequence of the form k^n.


LINKS

Table of n, a(n) for n=0..43.


EXAMPLE

49 is a member as 49=7^2 = 7 + 14 + 28.
400 is a member as 400 = 20^2 = 1 + 7 + 7^2 + 7^3.


CROSSREFS

Sequence in context: A090095 A178705 A163245 * A227863 A115557 A167718
Adjacent sequences: A084730 A084731 A084732 * A084734 A084735 A084736


KEYWORD

nonn


AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 14 2003


EXTENSIONS

More terms from David Wasserman, Jan 03 2005


STATUS

approved



