Increasing gaps in A038593 (lower terms).

Terms

a(0) =7a(1) =37a(2) =63a(3) =218a(4) =547a(5) =728a(6) =1027a(7) =2269a(8) =3635a(9) =4219a(10) =5941a(11) =7064a(12) =12881a(13) =20621a(14) =22661a(15) =28063a(16) =56079a(17) =57167a(18) =75500a(19) =91656a(20) =201283a(21) =267995a(22) =305208a(23) =412614a(24) =421874a(25) =496496a(26) =917288a(27) =1669564a(28) =1708625a(29) =2631258