4-dimensional analog of centered polygonal numbers.

Terms

a(0) =1a(1) =10a(2) =41a(3) =115a(4) =260a(5) =511a(6) =910a(7) =1506a(8) =2355a(9) =3520a(10) =5071a(11) =7085a(12) =9646a(13) =12845a(14) =16780a(15) =21556a(16) =27285a(17) =34086a(18) =42085a(19) =51415a(20) =62216a(21) =74635a(22) =88826a(23) =104950a(24) =123175a(25) =143676a(26) =166635a(27) =192241a(28) =220690a(29) =252185