358400domain: NAppears in sequencesIcosagonal numbers for which the sum of the digits is also an icosagonal number.at n=11A117799Number of edges in the n^2 X n^2 Sudoku graph.at n=7A182866Expansion of (2 x^4*(5 - 12*x + 8*x^2))/(1 - 2*x)^4.at n=13A268462