A092305 Length of period of sequence of Genocchi number of first kind read modulo (2n+1).

1, 3, 10, 21, 9, 55, 78, 30, 136, 171, 63, 253, 50, 27, 406, 465, 165, 210, 666, 234, 820, 903, 90, 1081, 147, 408, 1378, 550, 513, 1711, 1830, 189, 780, 2211, 759, 2485, 2628, 150, 1155, 3081, 81, 3403, 1360, 1218, 3916, 1638, 1395, 1710, 4656, 495, 5050

Offset

0,2

Links

Table of n, a(n) for n=0..50.

Formula

Conjecture : a(n)= (2n+1)*prod(p | 2n+1, (p-1)/2)=(2n+1)/(-2)^omega(2n+1)*sum(d | 2n+1, d*mu(d))

Crossrefs

Cf. A001469.

Sequence in context: A081205 A273379 A306813 * A196166 A073604 A370032

Adjacent sequences: A092302 A092303 A092304 * A092306 A092307 A092308

Keyword

nonn

Author

Benoit Cloitre, Feb 12 2004

Status

approved