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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.

A263882 Babbage quotients b_p = (binomial(2p-1, p-1) - 1)/p^2 with p = prime(n).

Table of values

n a(n)
2 1
3 5
4 35
5 2915
6 30771
7 4037381
8 48954659
9 7782070631
10 17875901604959
11 242158352370063
12 637739431824553035
13 126348774791431208099
14 1794903484322270273951
15 367972191114796344623951
16 1116504994413003106003899551
17 3498520498083111051973370669639

List of values

[1, 5, 35, 2915, 30771, 4037381, 48954659, 7782070631, 17875901604959, 242158352370063, 637739431824553035, 126348774791431208099, 1794903484322270273951, 367972191114796344623951, 1116504994413003106003899551, 3498520498083111051973370669639]

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

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