1018872811domain: NAppears in sequencesDoubly restricted composition numbers: number of compositions of floor(n(n+2)/2) into exactly n positive integers each no more than n+1.at n=10A077047Number of arrays of n integers in -5..5 with sum zero.at n=10A201549Number of arrays of 10 integers in -n..n with sum zero.at n=5A322537