1,1

X = a(n) = 4n^2+12n+3

for n=1 then a(1)=19=X; 19^3+6*19^2=95^2

Cf. A153167.

Sequence in context: A094845 A155770 A036061 this_sequence A090797 A078561 A074222

Adjacent sequences: A153166 A153167 A153168 this_sequence A153170 A153171 A153172

nonn

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 20 2008