a(n) = ((n-th prime)^5-(n-th prime)^3)/24.

Terms

a(0) =1a(1) =9a(2) =125a(3) =686a(4) =6655a(5) =15379a(6) =58956a(7) =102885a(8) =267674a(9) =853615a(10) =1191640a(11) =2887221a(12) =4824470a(13) =6122039a(14) =9551716a(15) =17418609a(16) =29779955a(17) =35182055a(18) =56242681a(19) =75161310a(20) =86361774a(21) =128190140a(22) =164102869a(23) =232639770a(24) =357767816a(25) =437877925a(26) =482985334