

A216442


Numbers of the form 2^i + 3^j + 5^k, where i, j, k >= 0.


1



3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 38, 40, 42, 44, 46, 48, 50, 53, 54, 56, 58, 60, 64, 66, 68, 70, 72, 74, 78, 83, 84, 86, 87, 88, 90, 92, 94, 96, 98, 102, 107, 108, 110, 114, 116, 118, 122, 127
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OFFSET

1,1


COMMENTS

Conjecture: Unlike A004050, which has a limited set of integers expressible in more than one way, this set has no such limit.
Number of terms less than or equal to 10^k, k > 0: 8, 56, 238, 615, 1304, 2169, 3606, 5280, 7196, 10414, ....


LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000


MATHEMATICA

mx = 140; Union@ Flatten@ Table[2^i + 3^j + 5^k, {i, 0, Log[2, mx]}, {j, 0, Log[3, mx  2^i]}, {k, 0, Log[5, mx  2^i  3^j]}]


CROSSREFS

Cf. A004050.
Sequence in context: A333491 A304816 A298005 * A298296 A099474 A105048
Adjacent sequences: A216439 A216440 A216441 * A216443 A216444 A216445


KEYWORD

nonn


AUTHOR

Robert G. Wilson v, Sep 20 2012


STATUS

approved



