635279domain: NPropertiesPrimalityPrimeyesAppears in sequencesSquare array T(n,k), read by antidiagonals: number of labeled trees, with increments of labels along edges constrained to -1,0,1, with n nodes that have no label greater than k.at n=43A101486This is to A139026 as A139026 to A139025, see A139025 for details.at n=27A139027Prime numbersat n=51735