%I #7 Jun 19 2016 15:00:13
%S 2,9,16,22,29,41,42,48,61,66,73,80,86,97,104,105,117,130,134,136,141,
%T 154,161,173,177,184,192,197,198,216,226,229,233,241,246,265,266,272,
%U 281,288,290,301,309,320,321,342,345,349,352,358,362,376,381,401,406,409
%N Sums of exactly two positive octagonal numbers A000567.
%C For octagonal numbers within this sequence, see: A136346. This is to octagonal numbers A000567 as A051533 is to triangular numbers A000217 and as A000404 is to squares A000290 and as A117104 is to heptagonal numbers A000566.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/OctagonalNumber.html">Octagonal Number</a>.
%F {A000567(i) + A000567(j), i, j > 0}. {i*(3*i-2) + j(3*j-2), i, j > 0}.
%Y Cf. A000567, A136117, A136346.
%K easy,nonn
%O 1,1
%A _Jonathan Vos Post_, Dec 25 2007
%E Missing term (80) from _Giovanni Resta_, Jun 19 2016
|