Number of compositions of n in which the minimal multiplicity of parts equals 2.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =7a(5) =10a(6) =32a(7) =31a(8) =71a(9) =77a(10) =222a(11) =342a(12) =971a(13) =1936a(14) =4681a(15) =9662a(16) =19440a(17) =38304a(18) =76458a(19) =143542a(20) =281447a(21) =536472a(22) =1051100a(23) =2039870a(24) =4055916a(25) =8030958a(26) =16168611a(27) =32510383a(28) =65705473a(29) =132895297