1,2

Define a(1)=1, a(2)=131, a(3)=398*a(1)+a(2), a(4)=398*a(2)+a(1) then a(n)=398*a(n-2)-a(n-4)

Cf. A105838.

Sequence in context: A068680 A142555 A118507 this_sequence A142205 A142807 A103834

Adjacent sequences: A105834 A105835 A105836 this_sequence A105838 A105839 A105840

nonn

Pierre CAMI (pierrecami(AT)tele2.fr), Apr 22 2005