A026869 a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), m=[ (n+1)/2 ], T given by A026747.
1, 1, 4, 5, 17, 23, 74, 104, 326, 468, 1447, 2104, 6459, 9466, 28968, 42658, 130473, 192656, 589993, 872290, 2678007, 3960318, 12199689, 18032179, 55769978, 82346931, 255807384, 377172666, 1177155945, 1732702830
Offset: 0