a(n) = A002070(n) + A036689(n).

Terms

a(0) =0a(1) =5a(2) =21a(3) =40a(4) =111a(5) =160a(6) =270a(7) =342a(8) =505a(9) =812a(10) =937a(11) =1335a(12) =1632a(13) =1800a(14) =2170a(15) =2750a(16) =3427a(17) =3672a(18) =4415a(19) =4967a(20) =5260a(21) =6152a(22) =6800a(23) =7847a(24) =9305a(25) =10102a(26) =10490a(27) =11360a(28) =11782a(29) =12665