Gaps of 4 in sequence A038593 (lower terms).

Terms

a(0) =331a(1) =988a(2) =14911a(3) =31228a(4) =37969a(5) =84877a(6) =102121a(7) =318607a(8) =1058524a(9) =1403593a(10) =3760549a(11) =4796881a(12) =4912657a(13) =5717500a(14) =5734996a(15) =6804124a(16) =7188928a(17) =9903013a(18) =10133125a(19) =14040871a(20) =16930555a(21) =22656877a(22) =32878231a(23) =35956348a(24) =41917948a(25) =44653687a(26) =46692367a(27) =47107222a(28) =47222197a(29) =53033461