A053202 - OEIS

A053202

Pascal's triangle (excluding first, last two elements of each row) read by rows, row n read mod n.

2, 0, 0, 3, 2, 3, 0, 0, 0, 0, 4, 0, 6, 0, 4, 0, 3, 0, 0, 3, 0, 5, 0, 0, 2, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 6, 4, 3, 0, 0, 0, 3, 4, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 7, 0, 7, 2, 7, 0, 7, 0, 7, 0, 5, 0, 3, 10, 0, 0, 10, 3, 0, 5, 0, 8, 0, 12, 0, 8, 0, 6, 0, 8, 0, 12, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

4,1

COMMENTS

Prime numbered rows contain all zeros.

LINKS

T. D. Noe, Rows n = 4..100 of triangle, flattened

EXAMPLE

Triangle begins:

0, 0;

3, 2, 3;

0, 0, 0, 0;

4, 0, 6, 0, 4;

...

row 8 = 28 mod 8, 56 mod 8, 70 mod 8, 56 mod 8, 28 mod 8 = 4, 0, 6, 0, 4.

MATHEMATICA

Table[Mod[Binomial[n, k], n], {n, 4, 18}, {k, 2, n-2}] // Flatten (* Jean-François Alcover, Jun 06 2017 *)

PROG

(Haskell)

a053202 n k = a053202_tabl !! (n - 4) !! k

a053202_row n = a053202_tabl !! (n - 4)

a053202_tabl = zipWith (\k row -> take (k - 3) $ drop 2 row)

[4..] $ drop 4 a053200_tabl

-- Reinhard Zumkeller, Jan 24 2014

CROSSREFS

Sum of row n = A053205(n). Cf. A053200, A053201, A053203, A007318 (Pascal's triangle).

Sequence in context: A341410 A205341 A195664 * A188122 A341841 A050186

Adjacent sequences: A053199 A053200 A053201 * A053203 A053204 A053205

KEYWORD

nonn,nice,tabl

AUTHOR

Asher Auel, Dec 12 1999

EXTENSIONS

a(44) corrected by T. D. Noe, Feb 08 2008

STATUS

approved