Convolution of odd numbers and A014306.

Terms

a(0) =0a(1) =1a(2) =4a(3) =8a(4) =13a(5) =20a(6) =29a(7) =40a(8) =53a(9) =67a(10) =82a(11) =99a(12) =118a(13) =139a(14) =162a(15) =187a(16) =214a(17) =243a(18) =274a(19) =306a(20) =339a(21) =374a(22) =411a(23) =450a(24) =491a(25) =534a(26) =579a(27) =626a(28) =675a(29) =726