a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) + a(n-5) with a(1) = a(2) = a(3) = 0, a(4) = 1, and a(5) = 3.

A385142

a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) + a(n-5) with a(1) = a(2) = a(3) = 0, a(4) = 1, and a(5) = 3.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =3a(5) =6a(6) =10a(7) =15a(8) =22a(9) =35a(10) =64a(11) =129a(12) =265a(13) =529a(14) =1013a(15) =1873a(16) =3394a(17) =6126a(18) =11148a(19) =20552a(20) =38303a(21) =71760a(22) =134408a(23) =250880a(24) =466361a(25) =864339a(26) =1600062a(27) =2963186a(28) =5494247a(29) =10200142

External references