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.

A246251 Number of permutations of [n] with exactly six occurrences of the consecutive step pattern up, down, down.

Table of values

n a(n)
19 1488257158851
20 176902009674966
21 13166075391964578
22 775944032960346939
23 39844140679287441918
24 1872063201155821139178
25 82897279832156950225548
26 3526803545750650310760216
27 146090377422354615989531688
28 5948505245302032452585146020
29 239776137775416266444362226760

List of values

[1488257158851, 176902009674966, 13166075391964578, 775944032960346939, 39844140679287441918, 1872063201155821139178, 82897279832156950225548, 3526803545750650310760216, 146090377422354615989531688, 5948505245302032452585146020, 239776137775416266444362226760]

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

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