1966381domain: NPropertiesPrimalityPrimeyesAppears in sequencesExpansion of (1-3x+x^2)/((1+x^2)(1-4x+x^2)).at n=12A099487Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(-x / (1 + x)^2) / (1 + x)^2 ).at n=6A380778Prime numbersat n=146620