login
A139230
Second differences of perfect numbers A000396.
11
446, 7164, 33534576, 8522776512, 120292503552, 2305842741852438528, 2658455991569831740043006737112629248, 191561942608236101977881394944640151127455097780436992
OFFSET
1,1
LINKS
FORMULA
a(n) = A139228(n+1) - A139228(n). - Jinyuan Wang, Mar 04 2020
MATHEMATICA
Differences[PerfectNumber[Range[12]], 2] (* Paolo Xausa, Oct 20 2023 *)
KEYWORD
nonn
AUTHOR
Omar E. Pol, Apr 19 2008
EXTENSIONS
a(5)-a(8) from Jinyuan Wang, Mar 04 2020
STATUS
approved