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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.

A300387 The number of paths of length 9*n from the origin to the line y = 2*x/7 with unit East and North steps that stay below the line or touch it.

Table of values

n a(n)
0 1
1 4
2 178
3 11654
4 900239
5 76266406
6 6853777795
7 641688752961
8 61916364799849
9 6113859987916630
10 614832988424140624
11 62752222758863566993
12 6483650829899569496380
13 676834416167597357806799
14 71278487569046416052210050
15 7563527671079260544924794587
16 807900192360879042402313084390

List of values

[1, 4, 178, 11654, 900239, 76266406, 6853777795, 641688752961, 61916364799849, 6113859987916630, 614832988424140624, 62752222758863566993, 6483650829899569496380, 676834416167597357806799, 71278487569046416052210050, 7563527671079260544924794587, 807900192360879042402313084390]

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

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