Number of subsets of {1..n} containing n such that it is not possible to choose a different binary index of each element.

A370589

Number of subsets of {1..n} containing n such that it is not possible to choose a different binary index of each element.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =6a(6) =17a(7) =42a(8) =67a(9) =175a(10) =400a(11) =870a(12) =1841a(13) =3820a(14) =7837a(15) =15920a(16) =30997a(17) =63370a(18) =128348a(19) =258699a(20) =520042a(21) =1043284a(22) =2090732a(23) =4186382a(24) =8379022a(25) =16765549a(26) =33540664a(27) =67092258a(28) =134198633a(29) =268412631

External references