Stirling transform of pi (A000720).

Terms

a(0) =0a(1) =0a(2) =1a(3) =5a(4) =21a(5) =88a(6) =389a(7) =1852a(8) =9525a(9) =52632a(10) =310141a(11) =1936489a(12) =12749204a(13) =88149847a(14) =637769490a(15) =4812457992a(16) =37763509549a(17) =307453610201