cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A357309 Number of ascent sequences of length 2n with n zeros.

Original entry on oeis.org

1, 1, 6, 54, 660, 10255, 193732, 4312980, 110598510, 3210608808, 104085718451, 3727491264497, 146140031249576, 6225801069767760, 286376011804522536, 14145748008085964988, 746808042116142422388, 41964968782188114180606, 2500755433211714966201145
Offset: 0

Views

Author

Alois P. Heinz, Sep 23 2022

Keywords

Examples

			a(2) = 4: 0011, 0012, 0101, 0102, 0110, 0120.
		

Crossrefs

Cf. A175579.

Formula

a(n) = A175579(2n,n).