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A173055
Numbers of the form a^b+b^a, a and b are odd primes, b > a.
2
368, 2530, 94932, 178478, 1596520, 48989176, 129145076, 1162268326, 1221074418, 1996813914, 94143190994, 96951758924, 762940872982, 19073488804224, 36314872537968, 68630377389272, 232630924325880, 617673396313738
OFFSET
1,1
COMMENTS
3^5 + 5^3 = 368, 3^7 + 7^3 = 2530, 5^7 + 7^5 = 94932,..
MATHEMATICA
f[a_, b_]:=Prime[a]^Prime[b]+Prime[b]^Prime[a]; Take[Union[Flatten[Table[f[a, b], {a, 2, 60}, {b, a+1, 60}]]], 40]
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved