Composite numbers k such that binomial(5*k, k) == 5^k (mod k).

A109760

Composite numbers k such that binomial(5*k, k) == 5^k (mod k).

Terms

    a(0) =4a(1) =365a(2) =400a(3) =685a(4) =3200a(5) =6400a(6) =12550a(7) =12800a(8) =16525a(9) =25600a(10) =51200a(11) =225125a(12) =70463125a(13) =271094125a(14) =431434441a(15) =1639197169a(16) =2434638125a(17) =3050358125

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