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.

A152515 1/7 of the number of permutations of 6 indistinguishable copies of 1..n with exactly 4 local maxima.

Table of values

n a(n)
1 0
2 50
3 321315
4 824734660
5 1615456263653
6 2896390530019554
7 5041787615373941503
8 8691245890710074064416
9 14935422227548071392068185
10 25640373750597951750787951486
11 44004685572828990924291145512563
12 75515015253707870321041620455156412
13 129585276023496655588712207028376849165

List of values

[0, 50, 321315, 824734660, 1615456263653, 2896390530019554, 5041787615373941503, 8691245890710074064416, 14935422227548071392068185, 25640373750597951750787951486, 44004685572828990924291145512563, 75515015253707870321041620455156412, 129585276023496655588712207028376849165]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.