OFFSET
1,1
LINKS
Paolo Xausa, Table of n, a(n) for n = 1..13
FORMULA
MATHEMATICA
Differences[PerfectNumber[Range[12]], 2] (* Paolo Xausa, Oct 20 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Apr 19 2008
EXTENSIONS
a(5)-a(8) from Jinyuan Wang, Mar 04 2020
STATUS
approved