A385232 Numbers that can be written as s^x + t^y, with 1 < s < t and {s,t} = {x,y}; that is, are of the form s^s + t^t or s^t + t^s.
17, 31, 32, 57, 100, 145, 177, 260, 283, 320, 368, 593, 945, 1124, 1649, 2169, 2530, 3129, 3152, 3381, 4240, 5392, 7073, 8361, 16580, 18785, 20412, 23401, 32993, 46660, 46683, 46912, 49781, 60049, 65792, 69632, 94932, 131361, 178478, 262468, 268705, 397585, 423393, 524649, 533169, 823547, 823570
Offset: 1
Examples
a(1) = 2^3 + 3^2 = 8 + 9 = 17. a(2) = 2^2 + 3^3 = 4 + 27 = 31. a(3) = 2^4 + 4^2 = 16 + 16 = 32. a(4) = 2^5 + 5^2 = 32 + 25 = 57.
Links
- David A. Corneth, Table of n, a(n) for n = 1..10000