login
A135626
Product of n-th perfect number and n-th perfect number written backwards.
0
36, 2296, 344224, 66795904, 2123921902809088, 55917383475391234048, 113139095670780538912768, 18936964716073275231635792697644548096, 17844842231875188005737387074890396164121166838056340379818586412691750912
OFFSET
1,1
FORMULA
a(n) = A000396(n)*A135624(n).
EXAMPLE
a(2)=2296 because the second perfect number is 28 and 28*82=2296.
MATHEMATICA
# IntegerReverse[#]&/@PerfectNumber[Range[10]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Nov 29 2020 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Omar E. Pol, Feb 20 2008
EXTENSIONS
More terms from R. J. Mathar, Jun 24 2009
STATUS
approved