A152830 Triangle read by rows, A007318 rows repeated four times .

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 4, 6, 4, 1, 1, 4, 6, 4, 1, 1, 4, 6, 4, 1, 1, 5, 10, 10, 5, 1, 1, 5, 10, 10, 5, 1, 1, 5, 10, 10, 5, 1, 1, 5, 10, 10, 5, 1, 1, 6, 15, 20, 15, 6, 1, 1, 6, 15, 20, 15, 6, 1, 1

Offset

0,14

Comments

Diagonal sums : A103372 .

Links

G. C. Greubel, Table of n, a(n) for the first 50 rows, flattened

Example

Triangle begins : 1 ; 1 ; 1 ; 1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,3,3,1 ; ...

Mathematica

Flatten[Table[#, {4}]&/@Table[Binomial[n, k], {n, 0, 6}, {k, 0, n}]] (* Harvey P. Dale, Sep 23 2015 *)

Crossrefs

Cf. A007318, A152198, A152815, A152828.

Sequence in context: A161074 A161113 A161048 * A175409 A161073 A161112

Adjacent sequences: A152827 A152828 A152829 * A152831 A152832 A152833

Keyword

easy,nonn,tabf

Author

Philippe Deléham, Dec 13 2008

Status

approved