Number of even graphical partitions.

Terms

a(0) =1a(1) =3a(2) =7a(3) =23a(4) =70a(5) =242a(6) =832a(7) =2983a(8) =10759a(9) =39482a(10) =145892a(11) =543877a(12) =2038831a(13) =7685211a(14) =29092055a(15) =110554267a(16) =421495147a(17) =1611676767