a(1) = 1; a(2) = 1; a(3) = 1; a(4) = 1; a(5) = 1; a(n) = a(n-1)+4a(n-2)-3a(n-3)-3a(n-4)+a(n-5) for n >= 6.

A122608

a(1) = 1; a(2) = 1; a(3) = 1; a(4) = 1; a(5) = 1; a(n) = a(n-1)+4a(n-2)-3a(n-3)-3a(n-4)+a(n-5) for n >= 6.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =0a(6) =-1a(7) =-6a(8) =-12a(9) =-32a(10) =-59a(11) =-134a(12) =-244a(13) =-519a(14) =-948a(15) =-1949a(16) =-3586a(17) =-7225a(18) =-13397a(19) =-26640a(20) =-49744a(21) =-98024a(22) =-184114a(23) =-360455a(24) =-680247a(25) =-1325397a(26) =-2510702a(27) =-4874298a(28) =-9260629a(29) =-17929771

External references