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A069355
Numbers of form 2^i*3^j - (i+j) with i, j >= 0.
3
1, 2, 4, 5, 7, 9, 12, 15, 20, 24, 27, 32, 43, 50, 58, 67, 77, 90, 103, 121, 138, 157, 185, 210, 238, 248, 281, 318, 376, 425, 480, 503, 568, 641, 723, 759, 856, 965, 1014, 1143, 1288, 1451, 1526, 1719, 1936, 2037, 2180, 2294, 2583, 2908, 3061, 3446, 3879, 4084
OFFSET
1,2
COMMENTS
Distinct values of A003586(m)-A069352(m) or of A069345(A003586(m)). - Michel Marcus, Apr 09 2018
EXAMPLE
1 is a term because 2^0*3^0 - (0+0) = 2^1*3^0 - (1+0) = 1.
2 is a term because 2^2*3^0 - (2+0) = 2^0*3^1 - (0+1) = 2.
4 is a term because 2^1*3^1 - (1+1) = 4.
MATHEMATICA
With[{nn=20}, Take[Flatten[Table[2^i 3^j-i-j, {i, 0, nn}, {j, 0, nn}]]//Union, 60]] (* Harvey P. Dale, Aug 29 2022 *)
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 18 2002
EXTENSIONS
Duplicated term 2 and incorrect formula removed by Altug Alkan, Apr 09 2018
STATUS
approved