A274591 Least number k such that k-1, k, k+1 are the sum of two nonzero squares in exactly n ways.
73, 22049, 90707201, 4359889
Offset: 1
Examples
a(2) = 22049 because 22048 = 12^2 + 148^2 = 68^2 + 132^2, 22049 = 32^2 + 145^2 = 40^2 + 143^2, 22050 = 21^2 + 147^2 = 105^2 + 105^2.
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