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A055789 C(n,round[sqrt(n)]). 0
1, 1, 2, 3, 6, 10, 15, 35, 56, 84, 120, 165, 220, 715, 1001, 1365, 1820, 2380, 3060, 3876, 4845, 20349, 26334, 33649, 42504, 53130, 65780, 80730, 98280, 118755, 142506, 736281, 906192, 1107568, 1344904, 1623160, 1947792, 2324784, 2760681 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..38.

EXAMPLE

a(9) = C(9,3) = 9!/(3!*6!) = 84

CROSSREFS

a(n^2) = A014062(n)

Sequence in context: A268064 A077011 A246868 * A238891 A048681 A051891

Adjacent sequences:  A055786 A055787 A055788 * A055790 A055791 A055792

KEYWORD

easy,nonn

AUTHOR

Henry Bottomley, Jul 13 2000

STATUS

approved

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Last modified January 23 19:12 EST 2020. Contains 331175 sequences. (Running on oeis4.)