0,2

A088918(a(n)) = n and A088918(k) <> n for k<a(n).

No terms after a(13) are smaller than 99000000. - John W. Layman (layman(AT)math.vt.edu), Jan 20 2004

Index entries for sequences related to sums of squares

a(2) = 410 = 7^2+19^2 = 11^2+17^2;

a(3) = 2210 = 19^2+43^2 = 23^2+41^2 = 29^2+37^2;

a(4) = 10370 = 13^2+101^2 = 31^2+97^2 = 59^2+83^2 = 71^2+73^2;

a(5) = 202130 = 23^2+449^2 = 97^2+439^2 = 163^2+419^2 = 211^2+397^2 = 251^2+373^2;

a(6) = 229970 = 23^2+479^2 = 109^2+467^2 = 193^2+439^2 = 263^2+401^2 = 269^2+397^2 = 331^2+347^2;

a(7) = 197210 = 31^2+443^2 = 67^2+439^2 = 107^2+431^2 = 173^2+409^2 = 199^2+397^2 = 241^2+373^2 = 311^2+317^2;

a(8) = 81770 = 41^2+283^2 = 53^2+281^2 = 71^2+277^2 = 97^2+269^2 = 137^2+251^2 = 157^2+239^2 = 179^2+223^2 = 193^2+211^2.

Sequence in context: A069876 A126086 A055203 this_sequence A142484 A098890 A012023

Adjacent sequences: A088916 A088917 A088918 this_sequence A088920 A088921 A088922

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 23 2003

More terms from John W. Layman (layman(AT)math.vt.edu), Jan 20 2004