A057516 Number of sea-level valleys in Catalan mountain ranges encoded by A014486.

0, 0, 1, 0, 2, 1, 1, 0, 0, 3, 2, 2, 1, 1, 2, 1, 1, 0, 0, 1, 0, 0, 0, 4, 3, 3, 2, 2, 3, 2, 2, 1, 1, 2, 1, 1, 1, 3, 2, 2, 1, 1, 2, 1, 1, 0, 0, 1, 0, 0, 0, 2, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 5, 4, 4, 3, 3, 4, 3, 3, 2, 2, 3, 2, 2, 2, 4, 3, 3, 2, 2, 3, 2, 2, 1, 1, 2, 1, 1, 1, 3, 2, 2, 1, 1, 2, 1, 1, 1, 2, 1, 1

Offset: 0

Author

Antti Karttunen, Sep 03 2000

Keywords

• nonn

Crossrefs

Cf. A057514.

Formula

a(0) = 0, a(n) = card(binexp2pars(A014486(n)))-1 = A057515(n)-1.