OFFSET
1,1
COMMENTS
A very rapidly growing sequence: a(4) and a(5) have 628 and 10942 digits.
FORMULA
sum(i^i, i=n+1, n+n^n)
EXAMPLE
a(2) = 50064 = 3^3 + 4^4 + 5^5 + 6^6.
MATHEMATICA
Table[Sum[i^i, {i, n+1, n+n^n}], {n, 5}]
CROSSREFS
KEYWORD
nonn,bref
AUTHOR
Zak Seidov, Sep 22 2002
EXTENSIONS
The next term is too large to include.
STATUS
approved