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.

A228724 Difference between pi(10^n) and A226945(n), where pi(x) is the number of primes <= x.

Original entry on oeis.org

0, 0, 0, 3, 7, -23, -73, -57, 186, 2126, 3161, 3885, 12731, 39462, -13815, -151907, 1117163, 5045162, -19274680, 18700047, 127912738, 252060543, -656184524, 2799754423, 5292148929, 27646015077, 49454963317, 271968742992
Offset: 1

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Author

Arkadiusz Wesolowski, Aug 31 2013

Keywords

Crossrefs

Formula

a(n) = A006880(n) - A226945(n).

Extensions

a(25)-a(26) added by David Baugh, Mar 17 2015
a(27)-a(28) added using A006880 and A226945, by Eduard Roure Perdices, Apr 16 2021