Empirical: a(n) = (1/8222838654177922817725562880000000)*n^31 + (1/17683523987479403909087232000000)*n^30 + (1/79536089898707963609088000000)*n^29 + (19/10697836653042591596544000000)*n^28 + (4583/25620869295102005084160000000)*n^27 + (132329/9678995067038535254016000000)*n^26 + (702983/852834530382416393011200000)*n^25 + (125806853/3127059944735526774374400000)*n^24 + (75920756623/46905899171032901615616000000)*n^23 + (821397337/15106569781331047219200000)*n^22 + (9968342491/6474244191999020236800000)*n^21 + (239625934913/6474244191999020236800000)*n^20 + (20133758085322841/26512029966235987869696000000)*n^19 + (1242507393431831/93024666548196448665600000)*n^18 + (56389226846877719/279073999644589345996800000)*n^17 + (4806887598334309/1824013069572479385600000)*n^16 + (44752905309544573/1510140690717474816000000)*n^15 + (126645666962353211/442974602610459279360000)*n^14 + (54994769304536499461/23531387543996438937600000)*n^13 + (809727247697544672719/50984673011992284364800000)*n^12 + (9914559458092478596877/112466190467630039040000000)*n^11 + (453141164688233380841/1118084934473515008000000)*n^10 + (185178202590210789384241/104700667792484155392000000)*n^9 + (1911372627812828932153/215433472824041472000000)*n^8 + (854052649707321159161783/19178262417705431040000000)*n^7 + (49631618764895678304463/306319469171683968000000)*n^6 + (1546920184726486961/3094136052239232000)*n^5 + (39139460169131957659/28362913812192960000)*n^4 + (1077825265697269054331/423012600284706432000)*n^3 + (5513437897431991/1598687075905920)*n^2 + (47446075673/24897164292)*n