A175677 Binomial(n,4) mod n.

0, 0, 0, 1, 0, 3, 0, 6, 0, 0, 0, 3, 0, 7, 0, 12, 0, 0, 0, 5, 0, 11, 0, 18, 0, 0, 0, 7, 0, 15, 0, 24, 0, 0, 0, 9, 0, 19, 0, 30, 0, 0, 0, 11, 0, 23, 0, 36, 0, 0, 0, 13, 0, 27, 0, 42, 0, 0, 0, 15, 0, 31, 0, 48, 0, 0, 0, 17, 0, 35, 0, 54, 0, 0, 0, 19, 0, 39, 0, 60, 0, 0, 0, 21, 0, 43, 0, 66, 0, 0, 0, 23, 0

Offset

1,6

Comments

Any patterns?

Links

Table of n, a(n) for n=1..93.

Formula

Apparently a(n)= +2*a(n-8) -a(n-16). [R. J. Mathar, Dec 12 2010]

Mathematica

Table[Mod[Binomial[n, 4], n], {n, 150}]

Crossrefs

Cf. A000332.

Sequence in context: A344503 A088969 A009780 * A129502 A099892 A060147

Adjacent sequences: A175674 A175675 A175676 * A175678 A175679 A175680

Keyword

nonn

Author

Zak Seidov, Aug 07 2010

Status

approved