Number of permutations of n letters that have all valleys even and all peaks odd and that end with an ascent.

A246015

Number of permutations of n letters that have all valleys even and all peaks odd and that end with an ascent.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =3a(4) =4a(5) =34a(6) =70a(7) =853a(8) =2365a(9) =36369a(10) =125870a(11) =2367212a(12) =9829820a(13) =218570717a(14) =1058927507a(15) =27167018427a(16) =150421002736

External references