107323domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of permutations of length n which avoid the patterns 1234, 2341, 4312.at n=16A116750p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - S - S^2 - S^3.at n=16A292322Prime numbersat n=10224