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.

A212235 Number of 0..2 arrays of length 2+2*n with sum no more than 2*n in any length 2n subsequence (=50% duty cycle).

Table of values

n a(n)
1 31
2 311
3 2902
4 26637
5 242780
6 2204646
7 19976155
8 180744711
9 1633768428
10 14757208260
11 133224377745
12 1202213897088
13 10845157390965
14 97807813761227
15 881892198839574
16 7950191559259765
17 71659250039164212
18 645816864760873772

List of values

[31, 311, 2902, 26637, 242780, 2204646, 19976155, 180744711, 1633768428, 14757208260, 133224377745, 1202213897088, 10845157390965, 97807813761227, 881892198839574, 7950191559259765, 71659250039164212, 645816864760873772]