Convolution of A023531 and odd numbers.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =8a(5) =12a(6) =16a(7) =20a(8) =25a(9) =31a(10) =37a(11) =43a(12) =49a(13) =56a(14) =64a(15) =72a(16) =80a(17) =88a(18) =96a(19) =105a(20) =115a(21) =125a(22) =135a(23) =145a(24) =155a(25) =165a(26) =176a(27) =188a(28) =200a(29) =212