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.

A227752 a(n) is the number of occurrences of n in A226062.

Original entry on oeis.org

1, 1, 1, 1, 1, 0, 2, 1, 1, 1, 0, 1, 2, 1, 2, 1, 1, 1, 0, 2, 0, 0, 0, 1, 2, 2, 0, 2, 2, 1, 2, 1, 1, 1, 1, 2, 1, 0, 1, 2, 1, 0, 0, 0, 1, 0, 1, 1, 2, 2, 1, 3, 1, 0, 1, 2, 2, 2, 1, 2, 2, 1, 2, 1, 1, 1, 1, 2, 1, 0, 1, 2, 2, 0, 0, 0, 2, 0, 2, 2, 1, 0, 0, 0, 0, 0, 0
Offset: 0

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Author

Antti Karttunen, Jul 26 2013

Keywords

Crossrefs

A227753 gives the positions of zeros.

Formula

In the following formula [] stands for Iverson brackets. Essentially we are just naively counting the integers which A226062 maps to n. A000225 is the guaranteed upper limit for the runlength codes for the partitions of size n:
a(n) = Sum_{i=0..A000225(A227183(n))} [A226062(i)==n].
a(n) = Sum_{i=A227368(A227183(n))..A000225(A227183(n))} [A226062(i)==n]. [This is slightly faster if somebody invents a clever formula for the lower limit A227368.]