a(n) = 3*a(n-1) + 10*a(n-2), n >= 2; a(0)=-1, a(1)=23.
A321133
a(n) = 3*a(n-1) + 10*a(n-2), n >= 2; a(0)=-1, a(1)=23.
Terms
- a(0) =-1a(1) =23a(2) =59a(3) =407a(4) =1811a(5) =9503a(6) =46619a(7) =234887a(8) =1170851a(9) =5861423a(10) =29292779a(11) =146492567a(12) =732405491a(13) =3662142143a(14) =18310481339a(15) =91552865447a(16) =457763409731
External references
- oeis: A321133