Numbers of the form k*(k^3 +- 1)/2.

Terms

a(0) =0a(1) =1a(2) =7a(3) =9a(4) =39a(5) =42a(6) =126a(7) =130a(8) =310a(9) =315a(10) =645a(11) =651a(12) =1197a(13) =1204a(14) =2044a(15) =2052a(16) =3276a(17) =3285a(18) =4995a(19) =5005a(20) =7315a(21) =7326a(22) =10362a(23) =10374a(24) =14274a(25) =14287a(26) =19201a(27) =19215a(28) =25305a(29) =25320