Number of compositions of n such that the number of parts and the smallest part are coprime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =14a(5) =30a(6) =62a(7) =124a(8) =247a(9) =495a(10) =994a(11) =1999a(12) =4020a(13) =8076a(14) =16204a(15) =32482a(16) =65076a(17) =130326a(18) =260927a(19) =522298a(20) =1045325a(21) =2091849a(22) =4185665a(23) =8374551a(24) =16754372a(25) =33517355a(26) =67048754a(27) =134120372a(28) =268277888a(29) =536615992