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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.

A271795 Number of set partitions of [n] having exactly eight pairs (m,m+1) such that m is in some block b and m+1 is in block b+1.

Table of values

n a(n)
8 0
9 1
10 45
11 1025
12 16886
13 232146
14 2866698
15 33168264
16 368982178
17 4012603359
18 43129752228
19 461687900917
20 4948321226569
21 53305007332086
22 578747255834560
23 6346136609521608
24 70385831812126618
25 790497553669858497
26 8997272765507744260
27 103842387079427555549

List of values

[0, 1, 45, 1025, 16886, 232146, 2866698, 33168264, 368982178, 4012603359, 43129752228, 461687900917, 4948321226569, 53305007332086, 578747255834560, 6346136609521608, 70385831812126618, 790497553669858497, 8997272765507744260, 103842387079427555549]

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

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