The sequence m(n) in A022905.

Terms

a(0) =0a(1) =2a(2) =5a(3) =8a(4) =14a(5) =20a(6) =29a(7) =38a(8) =53a(9) =68a(10) =89a(11) =110a(12) =140a(13) =170a(14) =209a(15) =248a(16) =302a(17) =356a(18) =425a(19) =494a(20) =584a(21) =674a(22) =785a(23) =896a(24) =1037a(25) =1178a(26) =1349a(27) =1520a(28) =1730a(29) =1940