Squares that are also pentagonal pyramidal numbers.

Terms

a(0) =0a(1) =1a(2) =196a(3) =2601a(4) =15376a(5) =60025a(6) =181476a(7) =461041a(8) =1032256a(9) =2099601a(10) =3960100a(11) =7027801a(12) =11861136a(13) =19193161a(14) =29964676a(15) =45360225a(16) =66846976a(17) =96216481a(18) =135629316a(19) =187662601a(20) =255360400a(21) =342287001a(22) =452583076a(23) =591024721a(24) =763085376a(25) =975000625a(26) =1233835876a(27) =1547556921a(28) =1925103376a(29) =2376465001