A371306 Least positive number k such that binomial(k^2,k) is divisible by n.

1, 2, 2, 3, 4, 2, 3, 6, 8, 4, 5, 3, 4, 3, 5, 6, 6, 8, 8, 4, 3, 5, 5, 6, 9, 4, 16, 3, 8, 5, 6, 14, 5, 6, 4, 8, 9, 8, 9, 10, 13, 3, 7, 6, 9, 5, 7, 6, 10, 9, 6, 4, 13, 16, 5, 6, 8, 8, 8, 14, 8, 6, 12, 23, 4, 5, 12, 6, 5, 4, 12, 8, 9, 9, 9, 8, 5, 9, 9, 14, 16, 13, 13, 3, 14, 7, 8, 6, 19, 9, 4, 7, 6, 7, 9, 14, 10, 10, 9, 16

Offset

1,2

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Prog

(PARI) a(n) = my(k=1); while(binomial(k^2, k)%n>0, k++); k;

Crossrefs

Cf. A014062.

Sequence in context: A230546 A286617 A328446 * A257062 A098223 A114892

Adjacent sequences: A371303 A371304 A371305 * A371307 A371308 A371309

Keyword

nonn,easy

Author

Seiichi Manyama, Mar 23 2024

Status

approved