Minimum value unattainable as the sum of 3 attained values of a*b with a,b 0..n integers.

Terms

a(0) =4a(1) =11a(2) =23a(3) =39a(4) =63a(5) =83a(6) =117a(7) =151a(8) =196a(9) =247a(10) =304a(11) =347a(12) =414a(13) =487a(14) =566a(15) =651a(16) =742a(17) =827a(18) =929a(19) =1019a(20) =1132a(21) =1251a(22) =1356a(23) =1463a(24) =1598a(25) =1739a(26) =1886a(27) =2039a(28) =2198a(29) =2363