Starts of runs of 3 consecutive Catalan-Niven numbers (A352508).

Terms

a(0) =4a(1) =55a(2) =144a(3) =145a(4) =511a(5) =2943a(6) =6950a(7) =7734a(8) =9470a(9) =9750a(10) =15630a(11) =15631a(12) =35034a(13) =35464a(14) =41590a(15) =41986a(16) =64735a(17) =68523a(18) =68870a(19) =77510a(20) =81150a(21) =90958a(22) =106063a(23) =118264a(24) =119043a(25) =135970a(26) =139403a(27) =163188a(28) =164862a(29) =164863