%I A052454
%S A052454 1,3,13,25,111,493,949,4215,18721,36037,160059,710905,1368457,6078027,
%T A052454 26995669
%N A052454 Positive integer values of n such that 10n^2 - 9 is a square.
%F A052454 It appears that a(n)=38a(n-3)-a(n-6).
%e A052454 25 is a term of the sequence since 10*25^2-9 = 6241 = 79^2.
%Y A052454 Cf. A082651, A077442.
%Y A052454 Sequence in context: A056714 A120074 A056706 this_sequence A066947 A031011 
               A099062
%Y A052454 Adjacent sequences: A052451 A052452 A052453 this_sequence A052455 A052456 
               A052457
%K A052454 nonn
%O A052454 1,2
%A A052454 John W. Layman (layman(AT)math.vt.edu), May 20 2003