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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.

A051770 Numbers n such that there exists a binomial coefficient C(n,k) where C(n,k)-1 and C(n,k)+1 are twin primes and 2<=k<=floor(n/2).

Table of values

n a(n)
1 4
2 11
3 54
4 69
5 77
6 89
7 91
8 155
9 173
10 199
11 202
12 202
13 208
14 218
15 245
16 272
17 286
18 293
19 293
20 323
21 324
22 347
23 368
24 370
25 373
26 379
27 413
28 489
29 512
30 514
31 533
32 549
33 552
34 558
35 637
36 650
37 674
38 731
39 749
40 759
41 771
42 773
43 782
44 783
45 787
46 811
47 849
48 850
49 883
50 896
51 902
52 927
53 937

List of values

[4, 11, 54, 69, 77, 89, 91, 155, 173, 199, 202, 202, 208, 218, 245, 272, 286, 293, 293, 323, 324, 347, 368, 370, 373, 379, 413, 489, 512, 514, 533, 549, 552, 558, 637, 650, 674, 731, 749, 759, 771, 773, 782, 783, 787, 811, 849, 850, 883, 896, 902, 927, 937]

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

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