Convolution of A001950 and A023533.

Terms

a(0) =2a(1) =5a(2) =7a(3) =12a(4) =18a(5) =22a(6) =28a(7) =33a(8) =38a(9) =46a(10) =53a(11) =61a(12) =70a(13) =77a(14) =85a(15) =93a(16) =100a(17) =109a(18) =116a(19) =126a(20) =137a(21) =147a(22) =158a(23) =168a(24) =178a(25) =190a(26) =199a(27) =210a(28) =221a(29) =230