Even pseudoprimes to base 31.

Terms

a(0) =6a(1) =10a(2) =30a(3) =66a(4) =946a(5) =3310a(6) =10470a(7) =36370a(8) =60126a(9) =104106a(10) =128766a(11) =170710a(12) =323670a(13) =369370a(14) =398266a(15) =596926a(16) =813430a(17) =1145166a(18) =1494690a(19) =2384866a(20) =5960746a(21) =6376126a(22) =8178346a(23) =18327310a(24) =31380922a(25) =34102630a(26) =37105762a(27) =40796526a(28) =41950966a(29) =41983446