The first 25 "spherical numbers"; that is, the number of ways to create a
surface with genus 0 from n triangles
Calculated for Kevin Fleming's senior math thesis
Harvey Mudd College, 2008

n	s_n
2	12
4	5184
6	9797760
8	45148078080
10	392212641300480
12	5560971849577267200
14	117391094784900602265600
16	3462828737553211406155776000
18	136277691266765369823587205120000
20	6907322403880515467242465445019648000
22	438592815685825521076615555845822873600000
24	34118764666055570874589461563569246379704320000
26	3192566929520985877695878934528888782412840960000000
28	353867162230884341283333247729207826546037060796416000000
30	45860925684703291876781584273813972310613283475376046080000000
32	6872180835685669359081480810960162656578883855821959195525120000000
34	1179189956336052967562992884940726120149386053436908659937168588800000000
36	229731985606734559306007952119698930792515610227406799091746910240768000000000
38	50437143528146097151198920451912320653766663117090382436245327416681037824000000000
40	12395789596647724432431542282413332765218194587105404271371673947216234271473664000000000
42	3390003295538708193246855835593759714657692090406338079740778987557813687136854999040000000000
44	1026111682196992293730449601841963831140455691928434325640425863523721800693033511860305920000000000
46	342094602359199754584128363403446793849458556400272238405590183320023197563236227237774706606080000000000
48	125064878133816844484212706714121771501822909347113026299617483701932085879785563578481613498839203840000000000
50	49935520586840098450178046116131807272516815401532629312260502885615592468193210374982173088941772468387840000000000