Haüy rhombic dodecahedral numbers.

Terms

a(0) =1a(1) =33a(2) =185a(3) =553a(4) =1233a(5) =2321a(6) =3913a(7) =6105a(8) =8993a(9) =12673a(10) =17241a(11) =22793a(12) =29425a(13) =37233a(14) =46313a(15) =56761a(16) =68673a(17) =82145a(18) =97273a(19) =114153a(20) =132881a(21) =153553a(22) =176265a(23) =201113a(24) =228193a(25) =257601a(26) =289433a(27) =323785a(28) =360753a(29) =400433