a(n) is the smallest k such that A340745(k) - k = n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =76a(6) =206a(7) =561a(8) =1524a(9) =4143a(10) =11261a(11) =30611a(12) =83210a(13) =226188a(14) =614843a(15) =1671317a(16) =4543110a(17) =12349453a(18) =33569293a(19) =91250800a(20) =248045393a(21) =674257283a(22) =1832821321a(23) =4982124892a(24) =13542819562a(25) =36813200321a(26) =100068653479a(27) =272014802350a(28) =739412894299