Sum of horizontal positions of the first peak in all bargraphs of semiperimeter n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =6a(5) =25a(6) =91a(7) =311a(8) =1029a(9) =3346a(10) =10778a(11) =34544a(12) =110444a(13) =352785a(14) =1126885a(15) =3601617a(16) =11521648a(17) =36899528a(18) =118322448a(19) =379908707a(20) =1221423149a(21) =3932113059a(22) =12675055399a(23) =40909511880a(24) =132200481507a(25) =427718677728