a(n) = position of 3*n^2 in sequence A025051 (numbers of form j*k + k*i + i*j, without repetitions, where 1 <= i <= j <= k).

A025056

a(n) = position of 3*n^2 in sequence A025051 (numbers of form j*k + k*i + i*j, without repetitions, where 1 <= i <= j <= k).

Terms

    a(0) =1a(1) =7a(2) =20a(3) =39a(4) =64a(5) =95a(6) =133a(7) =177a(8) =227a(9) =284a(10) =346a(11) =415a(12) =489a(13) =570a(14) =657a(15) =750a(16) =849a(17) =954a(18) =1065a(19) =1182a(20) =1305a(21) =1434a(22) =1569a(23) =1710a(24) =1857a(25) =2010a(26) =2169a(27) =2334a(28) =2505a(29) =2682

External references