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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.

A248787 Numbers x such that sigma(x) = rev(sigma*(x)), where sigma(x) is the sum of the divisors of x, sigma*(x) the sum of the anti-divisors of x and rev(x) the reverse of x.

Table of values

n a(n)
1 20
2 26
3 36531
4 42814
5 4513010
6 63033577

List of values

[20, 26, 36531, 42814, 4513010, 63033577]

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

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