32617domain: NAppears in sequencesT(2n+1,n+4), T given by A026758.at n=6A026879Number of peaks at odd level in all nondecreasing Dyck paths of semilength n. A nondecreasing Dyck path is a Dyck path for which the sequence of the altitudes of the valleys is nondecreasing.at n=10A121483