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 A173054 Numbers of the form a^b+b^a, a > 1, b > a. 5
 17, 32, 57, 100, 145, 177, 320, 368, 593, 945, 1124, 1649, 2169, 2530, 4240, 5392, 7073, 8361, 16580, 18785, 20412, 23401, 32993, 60049, 65792, 69632, 94932, 131361, 178478, 262468, 268705, 397585, 423393, 524649, 533169, 1048976, 1058576 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 2^3+3^2=17,.. LINKS T. D. Noe, Table of n, a(n) for n=1..1000 MATHEMATICA f[a_, b_]:=a^b+b^a; Take[Union[Flatten[Table[f[a, b], {a, 2, 50}, {b, a+1, 50}]]], 80] nn=10^50; n=1; Union[Reap[While[n++; k=n+1; num=n^k+k^n; num

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Last modified September 28 08:36 EDT 2021. Contains 347713 sequences. (Running on oeis4.)