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.

A151653 Number of permutations of 6 indistinguishable copies of 1..n with exactly 4 adjacent element pairs in decreasing order.

Table of values

n a(n)
1 0
2 225
3 1424925
4 879018750
5 286691702976
6 73088118705987
7 16754170871028591
8 3661270938396519084
9 782843888360213140770
10 165732454316454285337929
11 34929333979527314682936729
12 7346819169243119623855847994
13 1543904846626825596394472048820

List of values

[0, 225, 1424925, 879018750, 286691702976, 73088118705987, 16754170871028591, 3661270938396519084, 782843888360213140770, 165732454316454285337929, 34929333979527314682936729, 7346819169243119623855847994, 1543904846626825596394472048820]

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

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