Number of integer compositions of n matching both of the dashed patterns 23-1 and 1-32.

A375297

Number of integer compositions of n matching both of the dashed patterns 23-1 and 1-32.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =1a(10) =6a(11) =21a(12) =68a(13) =199a(14) =545a(15) =1410a(16) =3530a(17) =8557a(18) =20255a(19) =46968a(20) =107135a(21) =240927a(22) =535379a(23) =1177435a(24) =2566618a(25) =5551456

External references