Number of compositions of n such that the minimum part is equal to 1 and the first 1 occurs before any maximum part in the composition.

A238089

Number of compositions of n such that the minimum part is equal to 1 and the first 1 occurs before any maximum part in the composition.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =3a(5) =7a(6) =16a(7) =34a(8) =73a(9) =152a(10) =318a(11) =657a(12) =1356a(13) =2784a(14) =5703a(15) =11647a(16) =23740a(17) =48290a(18) =98073a(19) =198887a(20) =402837a(21) =815032a(22) =1647424a(23) =3327112a(24) =6714352a(25) =13540995a(26) =27292175a(27) =54978561a(28) =110697947a(29) =222790629

External references