Convolution of A023532 and odd numbers.

Terms

a(0) =1a(1) =3a(2) =6a(3) =11a(4) =17a(5) =24a(6) =33a(7) =44a(8) =56a(9) =69a(10) =84a(11) =101a(12) =120a(13) =140a(14) =161a(15) =184a(16) =209a(17) =236a(18) =265a(19) =295a(20) =326a(21) =359a(22) =394a(23) =431a(24) =470a(25) =511a(26) =553a(27) =596a(28) =641a(29) =688