1,2

Define a(1)=0, a(2)=39, a(3)=398*a(1)+198-a(2), a(4)=398*a(2)+198-a(1) then a(n)=398*a(n-2)+198-a(n-4)

Cf. A105837.

Sequence in context: A128826 A158593 A158598 this_sequence A124619 A068975 A101627

Adjacent sequences: A105835 A105836 A105837 this_sequence A105839 A105840 A105841

nonn

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