a(n) = 3*a(n-1) - 2*a(n-2) + 2*a(n-3) - 4*a(n-4) + 2*a(n-5), where a(0) = 2, a(1) =3, a(2) = 6, a(3)=13, a(4) = 29.

A287128

a(n) = 3*a(n-1) - 2*a(n-2) + 2*a(n-3) - 4*a(n-4) + 2*a(n-5), where a(0) = 2, a(1) =3, a(2) = 6, a(3)=13, a(4) = 29.

Terms

    a(0) =2a(1) =3a(2) =6a(3) =13a(4) =29a(5) =65a(6) =145a(7) =323a(8) =719a(9) =1599a(10) =3555a(11) =7903a(12) =17567a(13) =39047a(14) =86791a(15) =192911a(16) =428783a(17) =953055a(18) =2118351a(19) =4708447a(20) =10465439a(21) =23261471a(22) =51703135a(23) =114920255a(24) =255432575a(25) =567748479a(26) =1261931199a(27) =2804887039a(28) =6234405887a(29) =13857177215

External references