OFFSET
1,1
COMMENTS
Same as A046101 Biquadrateful numbers, until 113 = 81 + 16 + 16. After a finite number of integers which cannot be written as a sum of 4th powers of primes, all integers can be so written.
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = a*16 + b*81 + c*625 + d*2401 + e*14641 + ... where a,b,c,d,e,... are nonnegative integers. Sumset of A030514 4th powers of primes.
MATHEMATICA
ok[n_] := {} != Quiet@IntegerPartitions[n, All, Prime[ Range@ PrimePi@ Max[2, n^(1/4)]]^4, 1]; Select[Range[323], ok] (* Giovanni Resta, Jun 12 2016 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Sep 20 2006
EXTENSIONS
Several missing terms from Giovanni Resta, Jun 12 2016
STATUS
approved