Number of compositions of n such that the maximal cardinality of C is 1, where C is a subset of the set of parts such that all elements in C appear in weakly increasing order within the composition.
A387371
Number of compositions of n such that the maximal cardinality of C is 1, where C is a subset of the set of parts such that all elements in C appear in weakly increasing order within the composition.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =6a(5) =11a(6) =21a(7) =39a(8) =74a(9) =139a(10) =271a(11) =524a(12) =1031a(13) =2023a(14) =3998a(15) =7878a(16) =15601a(17) =30859a(18) =61192a(19) =121396a(20) =241272a(21) =479752a(22) =955184a(23) =1902672a(24) =3793039a(25) =7564517a(26) =15093683a(27) =30124784
External references
- oeis: A387371