1,1

A subsequence of A180436.

a(4) > 10^18, if it exists. - Giovanni Resta, Jun 14 2018

Table of n, a(n) for n=1..3.

554455 = 9^2 + ... + 118^2 = 331^2 + ... + 335^2.

9343439 = 102^2 + ... + 307^2 = 657^2 + ... + 677^2.

923222222329 = 2967^2 + ... + 14087^2 = 42462^2 + ... + 42967^2.

Cf. A180436.

Sequence in context: A204571 A253614 A249687 * A196511 A196733 A178554

Adjacent sequences: A267597 A267598 A267599 * A267601 A267602 A267603

nonn,more,bref,base

Chai Wah Wu, Jan 18 2016

approved