1,1
5 = 1^2 + 2^2.
Cf. A000045.
Sequence in context: A050950 A079991 A091270 this_sequence A122025 A057873 A116699
Adjacent sequences: A045700 A045701 A045702 this_sequence A045704 A045705 A045706
nonn
Felice Russo (felice.russo(AT)katamail.com)
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