%I A048911
%S A048911 1,3,33,91,989,2727,29637,81719,888121,2448843,26613993,73383571,
%T A048911 797531669,2199058287,23899336077,65898365039,716182550641,
%U A048911 1974751892883,21461577183153,59176658421451,643131132943949
%N A048911 Indices of square numbers which are also 9-gonal.
%H A048911 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               NonagonalSquareNumber.html">Link to a section of The World of Mathematics.</
               a>
%Y A048911 Cf. A048910, A036411.
%Y A048911 Sequence in context: A139222 A123049 A153783 this_sequence A089015 A062215 
               A132122
%Y A048911 Adjacent sequences: A048908 A048909 A048910 this_sequence A048912 A048913 
               A048914
%K A048911 nonn
%O A048911 1,2
%A A048911 Eric Weisstein (eric(AT)weisstein.com)