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Search: id:A060539
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| A060539 |
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Table by antidiagonals of number of ways of choosing k items from nk. |
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+0
6
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| 1, 1, 2, 1, 6, 3, 1, 20, 15, 4, 1, 70, 84, 28, 5, 1, 252, 495, 220, 45, 6, 1, 924, 3003, 1820, 455, 66, 7, 1, 3432, 18564, 15504, 4845, 816, 91, 8, 1, 12870, 116280, 134596, 53130, 10626, 1330, 120, 9, 1, 48620, 735471, 1184040, 593775, 142506, 20475, 2024, 153
(list; table; graph; listen)
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OFFSET
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1,3
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FORMULA
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a(n) =C(nk, k) =A007318(nk, k) =A060538(n, k)/A060538(n-1, k)
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CROSSREFS
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Rows include A000012, A000984, A005809, A005810, A001449, A004355, A004368. Columns include A000027, A000384, A006566, A060541. Main diagonal is A014062.
Sequence in context: A121468 A092392 A128741 this_sequence A103905 A103209 A089900
Adjacent sequences: A060536 A060537 A060538 this_sequence A060540 A060541 A060542
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KEYWORD
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nonn,tabl
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Apr 02 2001
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