a(n) = (16*n + 1)*(2592*n^2 + 288*n + 7).

Terms

a(0) =7a(1) =49079a(2) =361383a(3) =1185751a(4) =2771015a(5) =5366007a(6) =9219559a(7) =14580503a(8) =21697671a(9) =30819895a(10) =42196007a(11) =56074839a(12) =72705223a(13) =92335991a(14) =115215975a(15) =141594007a(16) =171718919a(17) =205839543a(18) =244204711a(19) =287063255a(20) =334664007a(21) =387255799a(22) =445087463a(23) =508407831a(24) =577465735a(25) =652510007a(26) =733789479a(27) =821552983