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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.

A243877 Number of Dyck paths of semilength n having exactly 7 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).

Table of values

n a(n)
29 1
30 9
31 61
32 385
33 2323
34 13583
35 77363
36 430573
37 2348528
38 12584052
39 66372328
40 345160962
41 1772302098
42 8996192858
43 45189272314
44 224832198163
45 1108842335240
46 5424622033040
47 26340438937256
48 127018289627132
49 608569050945950
50 2898295732654434
51 13725710735084610

List of values

[1, 9, 61, 385, 2323, 13583, 77363, 430573, 2348528, 12584052, 66372328, 345160962, 1772302098, 8996192858, 45189272314, 224832198163, 1108842335240, 5424622033040, 26340438937256, 127018289627132, 608569050945950, 2898295732654434, 13725710735084610]

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

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