Integers k such that there are i groups of order k+i up to isomorphism, for i=1,2,3,4.

Terms

a(0) =72a(1) =20664a(2) =66600a(3) =84744a(4) =89784a(5) =141240a(6) =175032a(7) =232680a(8) =271272a(9) =288072a(10) =378984a(11) =428472a(12) =620472a(13) =697320a(14) =740520a(15) =789672a(16) =792360a(17) =1016472a(18) =1063272a(19) =1207704a(20) =1250472a(21) =1304472a(22) =1338600a(23) =1570584a(24) =1617672a(25) =1628472a(26) =1844472a(27) =2150712a(28) =2186472a(29) =2283672