Numerator of Sum_{k=1..n} 1/(k * 2^k).

Terms

a(0) =1a(1) =5a(2) =2a(3) =131a(4) =661a(5) =1327a(6) =1163a(7) =148969a(8) =447047a(9) =44711a(10) =983705a(11) =7869871a(12) =102309709a(13) =204620705a(14) =31972079a(15) =32739453941a(16) =556571077357a(17) =556571247527