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A133634
Nonprime numbers k such that binomial(k+p,k) mod k = 1, where p=4.
36
10, 25, 26, 34, 35, 49, 50, 55, 58, 65, 74, 77, 82, 85, 91, 95, 98, 106, 115, 119, 121, 122, 125, 130, 133, 143, 145, 146, 154, 155, 161, 169, 170, 175, 178, 185, 187, 194, 202, 203, 205, 209, 215, 217, 218, 221, 226, 235, 242, 245, 247, 250, 253, 259, 265, 266
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[300], !PrimeQ[#]&&Mod[Binomial[#+4, #], #]==1&] (* Harvey P. Dale, Oct 09 2011 *)
KEYWORD
nonn
AUTHOR
Hieronymus Fischer, Sep 30 2007
STATUS
approved