84977domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of binary strings of length n with equal numbers of 0001 and 0110 substrings.at n=18A164159T(n,k) is the number of length-n weak ascent sequences (prefixed with a zero) with k weak ascents, triangle read by rows.at n=52A369321Prime numbersat n=8275