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 A076302 Triangle T(n,k) = number of k-smooth divisors of n, read by rows. 0
 1, 1, 2, 1, 1, 2, 1, 3, 3, 3, 1, 1, 1, 1, 2, 1, 2, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 2, 1, 4, 4, 4, 4, 4, 4, 4, 1, 1, 3, 3, 3, 3, 3, 3, 3, 1, 2, 2, 2, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 3, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS T(n,n)=A000005(n); T(n,2)=A001511(n) for n>1; T(n,3)=A072078(n) for n>2. LINKS Eric Weisstein's World of Mathematics, Divisor Function. Eric Weisstein's World of Mathematics, Smooth Number. EXAMPLE Triangle begins: .................. 1 ................ 1...2 .............. 1...1...2 ............ 1...3...3...3 .......... 1...1...1...1...2 ........ 1...2...4...4...4...4 ...... 1...1...1...1...1...1...2 .... 1...4...4...4...4...4...4...4 .. 1...1...3...3...3...3...3...3...3. CROSSREFS Sequence in context: A239000 A105248 A289495 * A104524 A233322 A233324 Adjacent sequences:  A076299 A076300 A076301 * A076303 A076304 A076305 KEYWORD nonn,tabl AUTHOR Reinhard Zumkeller, Mar 14 2003 STATUS approved

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Last modified November 23 17:10 EST 2020. Contains 338595 sequences. (Running on oeis4.)