Partial sums of Iccanobif numbers A001129.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =12a(6) =20a(7) =33a(8) =72a(9) =196a(10) =710a(11) =1546a(12) =2599a(13) =6738a(14) =19553a(15) =80688a(16) =185625a(17) =978142a(18) =2432840a(19) =12112678a(20) =29466988a(21) =39202128a(22) =40962878a(23) =41948928a(24) =42570288a(25) =42684103a(26) =43265540a(27) =44518036a(28) =52194742a(29) =65214030