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A036517 Smallest triangular number containing exactly n 0's. 1
0, 300, 20100, 300700, 2001000, 50005000, 200010000, 5000050000, 20000100000, 500000500000, 2000001000000, 50000005000000, 200000010000000, 5000000050000000, 20000000100000000, 500000000500000000, 2000000001000000000, 50000000005000000000 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

a(n) = A000217(A048355(n)).

CROSSREFS

Sequence in context: A188252 A128391 A092715 * A190880 A063935 A015275

Adjacent sequences:  A036514 A036515 A036516 * A036518 A036519 A036520

KEYWORD

nonn,base

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 16 09:56 EST 2012. Contains 205904 sequences.