a(n) = Sum_{k=0..m} (k+1) * A026022(n, k), where m=n for n=0,1 and m = floor((n+3)/2) for n >= 2.

A027298

a(n) = Sum_{k=0..m} (k+1) * A026022(n, k), where m=n for n=0,1 and m = floor((n+3)/2) for n >= 2.

Terms

    a(0) =1a(1) =3a(2) =8a(3) =20a(4) =43a(5) =101a(6) =208a(7) =472a(8) =958a(9) =2126a(10) =4288a(11) =9368a(12) =18835a(13) =40673a(14) =81632a(15) =174704a(16) =350266a(17) =744290a(18) =1491232a(19) =3150424a(20) =6309246a(21) =13265138a(22) =26557408a(23) =55610960a(24) =111311068a(25) =232279836a(26) =464856832a(27) =967155824a(28) =1935314563

External references