Numbers of form 2^i*3^j - (i+j) with i, j >= 0.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =7a(5) =9a(6) =12a(7) =15a(8) =20a(9) =24a(10) =27a(11) =32a(12) =43a(13) =50a(14) =58a(15) =67a(16) =77a(17) =90a(18) =103a(19) =121a(20) =138a(21) =157a(22) =185a(23) =210a(24) =238a(25) =248a(26) =281a(27) =318a(28) =376a(29) =425