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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.

A136094 a(n) is the smallest number consisting of digits {1,...,n} that contains all the permutations of {1,...,n} as subsequences.

Table of values

n a(n)
1 1
2 121
3 1213121
4 123412314213
5 1234512341523142351
6 1234516234152361425312643512
7 123451672341526371425361274351263471253
8 1234156782315426738152643718265341278635124376812453

List of values

[1, 121, 1213121, 123412314213, 1234512341523142351, 1234516234152361425312643512, 123451672341526371425361274351263471253, 1234156782315426738152643718265341278635124376812453]

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

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