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.

A254316 Hankel transform of a(n) is A006720(n+1). Hankel transform of a(n+1) is A006720(n+3).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 21
5 78
6 299
7 1172
8 4677
9 18947
10 77746
11 322545
12 1350906
13 5704822
14 24265651
15 103872254
16 447146683
17 1934538301
18 8407277728
19 36685185300
20 160663301053
21 705974374128
22 3111584887543
23 13752592535137
24 60939737103636
25 270672216346769
26 1204862348053296

List of values

[1, 1, 2, 6, 21, 78, 299, 1172, 4677, 18947, 77746, 322545, 1350906, 5704822, 24265651, 103872254, 447146683, 1934538301, 8407277728, 36685185300, 160663301053, 705974374128, 3111584887543, 13752592535137, 60939737103636, 270672216346769, 1204862348053296]

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

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