OFFSET
1,1
COMMENTS
LINKS
Walter Kehowski, Table of n, a(n) for n = 1..12
EXAMPLE
Since p=2 and M_2=3, then a(1)=2^(2*2+1)*3^3=288, and 288 has spectral basis {15^2, 2^6}, consisting of powers.
MAPLE
MATHEMATICA
2^(2 * (p = MersennePrimeExponent[Range[9]]) + 1) * (2^p - 1)^2 (* Amiram Eldar, Jan 03 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Walter Kehowski, Jan 01 2020
STATUS
approved