Number of subsets of {1..n} containing n and some element equal to the sum of two other (possibly equal) elements.

A365070

Number of subsets of {1..n} containing n and some element equal to the sum of two other (possibly equal) elements.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =9a(6) =24a(7) =46a(8) =109a(9) =209a(10) =469a(11) =922a(12) =1932a(13) =3858a(14) =7952a(15) =15831a(16) =32214a(17) =64351a(18) =129813a(19) =259566a(20) =521681a(21) =1042703a(22) =2091626a(23) =4182470a(24) =8376007a(25) =16752524a(26) =33530042a(27) =67055129a(28) =134165194a(29) =268328011

External references