OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..460
EXAMPLE
a(5) = 11^1 + 7^2 + 5^3 + 3^4 + 2^5 = 11 + 49 + 125 + 81 + 32 = 298.
MAPLE
seq(add(ithprime(i)^(n-i+1), i=1..n), n=1..30); # Robert Israel, Mar 23 2021
MATHEMATICA
f[n_] := Sum[ Prime[i]^(n - i + 1), {i, n}]; Table[ f[n], {n, 1, 20}] (* Robert G. Wilson v, Feb 18 2004 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Felix Tubiana, Feb 16 2004
EXTENSIONS
More terms from Ray Chandler and Robert G. Wilson v, Feb 18 2004
STATUS
approved