A026073 T(2n,n), where T is the array defined in A024996.
1, 2, 5, 24, 133, 736, 4135, 23452, 134043, 770864, 4455462, 25859380, 150615223, 879876040, 5153445895, 30251941860, 177938418225, 1048452751872, 6187400646130, 36566048896896, 216370786646054
Offset: 0
Keywords
Crossrefs
Bisection of A026078.