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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.

A118478 a(n) is the smallest m such that m*(m+1) is divisible by the first n prime numbers.

Table of values

n a(n)
1 1
2 2
3 5
4 14
5 209
6 714
7 714
8 62985
9 367080
10 728364
11 64822394
12 1306238010
13 11182598504
14 715041747420
15 51913478860880
16 454746157008780
17 9314160363311804
18 261062105979210899
19 261062105979210899
20 696537082207206753590
21 54097844397380813592485
22 286495021083846822067820

List of values

[1, 2, 5, 14, 209, 714, 714, 62985, 367080, 728364, 64822394, 1306238010, 11182598504, 715041747420, 51913478860880, 454746157008780, 9314160363311804, 261062105979210899, 261062105979210899, 696537082207206753590, 54097844397380813592485, 286495021083846822067820]

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

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