a(n) = 3*a(n-1) + 4*a(n-2) + a(n-3) with a(0)=3, a(1)=3, a(2)=17.

A215076

a(n) = 3*a(n-1) + 4*a(n-2) + a(n-3) with a(0)=3, a(1)=3, a(2)=17.

Terms

    a(0) =3a(1) =3a(2) =17a(3) =66a(4) =269a(5) =1088a(6) =4406a(7) =17839a(8) =72229a(9) =292449a(10) =1184102a(11) =4794331a(12) =19411850a(13) =78596976a(14) =318232659a(15) =1288497731a(16) =5217020805a(17) =21123285998a(18) =85526438945a(19) =346289481632

External references