Where records occur in A001917.

Terms

a(0) =2a(1) =4a(2) =11a(3) =21a(4) =31a(5) =110a(6) =124a(7) =185a(8) =279a(9) =399a(10) =716a(11) =1028a(12) =4552a(13) =6207a(14) =6543a(15) =11424a(16) =11557a(17) =12251a(18) =16199a(19) =23043a(20) =43390a(21) =155798a(22) =203095a(23) =457523a(24) =699782a(25) =865318a(26) =1294026a(27) =2918851a(28) =5635889a(29) =6459777