OFFSET
2,1
LINKS
Ray Chandler, Max Alekseyev, Table of n, a(n) for n = 2..24
Max A. Alekseyev, Computing the Inverses, their Power Sums, and Extrema for Euler's Totient and Other Multiplicative Functions. Journal of Integer Sequences, Vol. 19 (2016), Article 16.5.2
FORMULA
EXAMPLE
a(9) = 154448901. Sigma(154448901) = A002110(9) = 223092870 = 2*3*5*7*11*13*17*19*23.
CROSSREFS
KEYWORD
nonn
AUTHOR
Donovan Johnson, Dec 19 2008
EXTENSIONS
Extended by Ray Chandler, Dec 28 2008
Terms a(22)-a(24) in b-file from Max Alekseyev, Jan 29 2012
STATUS
approved