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.

A369733 Number of solutions to 2*k_1 + 3*k_2 + ... + prime(n)*k_n = 1, where k_i are from {-1,0,1}, i=1..n.

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 3
5 8
6 18
7 39
8 95
9 233
10 565
11 1440
12 3640
13 9409
14 24957
15 66699
16 177931
17 475584
18 1292985
19 3517163
20 9636135
21 26675682
22 73847316
23 205379443
24 571621138
25 1588186858
26 4435778209
27 12474517743
28 35194193531
29 99781874834
30 283513309423
31 799779819641

List of values

[0, 0, 1, 1, 3, 8, 18, 39, 95, 233, 565, 1440, 3640, 9409, 24957, 66699, 177931, 475584, 1292985, 3517163, 9636135, 26675682, 73847316, 205379443, 571621138, 1588186858, 4435778209, 12474517743, 35194193531, 99781874834, 283513309423, 799779819641]

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

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