A193769 Numbers of the form (3^a+5^b)/2 ; a,b >= 0 (with repetition).

1, 2, 3, 4, 5, 7, 13, 14, 14, 16, 17, 26, 41, 43, 53, 63, 64, 67, 76, 103, 122, 124, 134, 184, 313, 314, 317, 326, 353, 365, 367, 377, 427, 434, 677, 1094, 1096, 1106, 1156, 1406, 1563, 1564, 1567, 1576, 1603, 1684, 1927, 2656

Offset

1,2

Comments

Elements of the table A193770 (motivated by the less fundamental A081458), sorted by increasing size.

The value 14 = (3^1+5^2)/2 = (3^3+5^0)/2, therefore it occurs twice.

Links

Table of n, a(n) for n=1..48.

Prog

(PARI) select( t->t<3000, vecsort(concat(Vec( matrix(9, 6, x, y, (3^(x-1)+5^(y-1))/2 )))))

Crossrefs

Cf. A193770 (the table), A081458 (the subtable obtained for even a,b).

Sequence in context: A352820 A137357 A100676 * A226790 A275575 A066661

Adjacent sequences: A193766 A193767 A193768 * A193770 A193771 A193772

Keyword

nonn

Author

M. F. Hasler, Jan 01 2013

Status

approved