A005815 Recurrence (of order 10): 96*(36*n^5 - 712*n^4 + 5534*n^3 - 20771*n^2 + 36571*n - 22806)*a(n) = 32*(n-1)*(72*n^6 - 1316*n^5 + 9148*n^4 - 28966*n^3 + 39869*n^2 - 30144*n + 45732)*a(n-1) - 32*(n-2)*(n-1)*(72*n^6 - 1676*n^5 + 15748*n^4 - 74396*n^3 + 178684*n^2 - 184829*n + 30319)*a(n-2) - 16*(n-3)*(n-2)*(n-1)*(108*n^6 - 2352*n^5 + 20586*n^4 - 92017*n^3 + 216387*n^2 - 238503*n + 74546)*a(n-3) + 8*(n-4)*(n-3)*(n-2)*(n-1)*(144*n^6 - 2956*n^5 + 24692*n^4 - 104862*n^3 + 229455*n^2 - 220443*n + 40440)*a(n-4) + 4*(n-4)*(n-3)*(n-2)*(n-1)*(144*n^7 - 3352*n^6 + 32756*n^5 - 173360*n^4 + 533096*n^3 - 937619*n^2 + 825089*n - 209446)*a(n-5) + 4*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(144*n^6 - 3064*n^5 + 26148*n^4 - 113318*n^3 + 255618*n^2 - 264475*n + 76418)*a(n-6) - 2*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(144*n^6 - 3244*n^5 + 28696*n^4 - 124830*n^3 + 267767*n^2 - 236943*n + 35360)*a(n-7) - 4*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(36*n^6 - 820*n^5 + 7302*n^4 - 32410*n^3 + 73386*n^2 - 73692*n + 17905)*a(n-8) - 2*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(36*n^5 - 568*n^4 + 3358*n^3 - 8760*n^2 + 8863*n - 1356)*a(n-9) - (n-9)*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(36*n^5 - 532*n^4 + 3046*n^3 - 8081*n^2 + 8963*n - 2148)*a(n-10)