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A004785
5!(2n-6)!/n!(n-1)! is an integer.
0
3, 5, 6, 101, 211, 461, 552, 562, 852, 947, 990, 1223, 1432, 1451, 1458, 1506, 1600, 1626, 1892, 2015, 2069, 2147, 2185, 2333, 2480, 2481, 2666, 2994, 3011, 3017, 3356, 3418, 3433, 3442, 3478, 3479, 3485, 3521, 3554, 3566, 3571, 3620, 3628
OFFSET
1,1
MATHEMATICA
Select[Range[4000], IntegerQ[5!(2#-6)!/(#!(#-1)!)]&] (* Harvey P. Dale, Jun 05 2011 *)
CROSSREFS
Sequence in context: A137082 A242501 A099414 * A099744 A024601 A173013
KEYWORD
nonn
AUTHOR
EXTENSIONS
3 and 5 added to the sequence by Harvey P. Dale, Jun 05 2011
STATUS
approved