Smallest members of infinitary sociable quadruples.

Terms

a(0) =1026a(1) =10098a(2) =10260a(3) =41800a(4) =45696a(5) =100980a(6) =241824a(7) =685440a(8) =4938136a(9) =13959680a(10) =14958944a(11) =25581600a(12) =28158165a(13) =32440716a(14) =36072320a(15) =55204500a(16) =74062944a(17) =81128632a(18) =149589440a(19) =178327008a(20) =192793770a(21) =209524210a(22) =283604220a(23) =319848642a(24) =498215416a(25) =581112000a(26) =740629440a(27) =1236402232