Partial sums of A164532.

Terms

a(0) =1a(1) =5a(2) =11a(3) =35a(4) =71a(5) =215a(6) =431a(7) =1295a(8) =2591a(9) =7775a(10) =15551a(11) =46655a(12) =93311a(13) =279935a(14) =559871a(15) =1679615a(16) =3359231a(17) =10077695a(18) =20155391a(19) =60466175a(20) =120932351a(21) =362797055a(22) =725594111a(23) =2176782335a(24) =4353564671a(25) =13060694015a(26) =26121388031a(27) =78364164095