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.

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A116031 sigma(n)-phi(n) and sigma(n)+phi(n) are two palindromes greater than 2.

Original entry on oeis.org

4, 388, 403, 10010, 11481, 12215, 41242, 42173, 44243, 223261, 223487, 403303, 2302031, 3288877, 3490447, 32605627, 40077553, 40162802, 42311323, 44044043, 117426509, 222613051, 230777581, 232075811, 287772226, 307222207, 327067459
Offset: 1

Views

Author

Giovanni Resta, Feb 13 2006

Keywords

Examples

			sigma(3288877)-phi(3288877) = 44444 and
sigma(3288877)+phi(3288877)=6577756.

Crossrefs

Cf. A115897, A116030.

Extensions

a(15)-a(27) from Donovan Johnson, Feb 05 2010
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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