Records in A031883 (positions).

Terms

a(0) =1a(1) =2a(2) =6a(3) =14a(4) =36a(5) =122a(6) =162a(7) =450a(8) =2364a(9) =4760a(10) =4818a(11) =8541a(12) =19570a(13) =44514a(14) =47448a(15) =114885a(16) =378956a(17) =384324a(18) =542246a(19) =1275572a(20) =1385164a(21) =3865640a(22) =4514352a(23) =5226312a(24) =6271502a(25) =12817002a(26) =18665964a(27) =19815336a(28) =33506604a(29) =42712210