a(n) = n*(n + 11)*(n + 22)/6.

Terms

a(0) =0a(1) =46a(2) =104a(3) =175a(4) =260a(5) =360a(6) =476a(7) =609a(8) =760a(9) =930a(10) =1120a(11) =1331a(12) =1564a(13) =1820a(14) =2100a(15) =2405a(16) =2736a(17) =3094a(18) =3480a(19) =3895a(20) =4340a(21) =4816a(22) =5324a(23) =5865a(24) =6440a(25) =7050a(26) =7696a(27) =8379a(28) =9100a(29) =9860