Position of n-th 4 in A030496.

Terms

a(0) =24a(1) =28a(2) =32a(3) =36a(4) =40a(5) =44a(6) =49a(7) =53a(8) =58a(9) =63a(10) =66a(11) =71a(12) =73a(13) =77a(14) =82a(15) =87a(16) =90a(17) =95a(18) =97a(19) =101a(20) =106a(21) =111a(22) =114a(23) =119a(24) =121a(25) =126a(26) =131a(27) =136a(28) =141a(29) =146