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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.

A236436 Denominator of product_{k=1..n-1} (1 + 1/prime(k)).

Table of values

n a(n)
1 1
2 2
3 1
4 5
5 35
6 385
7 715
8 12155
9 46189
10 1062347
11 30808063
12 955049953
13 1859834119
14 76253198879
15 298080686527
16 14009792266769
17 742518990138757
18 43808620418186663
19 86204059532560853
20 339745411098916303
21 24121924188023057513
22 47591904479072518877
23 3759760453846728991283

List of values

[1, 2, 1, 5, 35, 385, 715, 12155, 46189, 1062347, 30808063, 955049953, 1859834119, 76253198879, 298080686527, 14009792266769, 742518990138757, 43808620418186663, 86204059532560853, 339745411098916303, 24121924188023057513, 47591904479072518877, 3759760453846728991283]

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

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