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A290318 Triangle read by rows. Row n gives the denominators of the coefficients of the Bernoulli polynomials of the second kind (in rising powers). 2
1, 2, 1, 6, 1, 1, 4, 1, 2, 1, 30, 1, 1, 1, 1, 4, 1, 1, 3, 2, 1, 84, 1, 1, 1, 2, 1, 1, 24, 1, 1, 3, 4, 1, 2, 1, 90, 1, 1, 1, 1, 1, 3, 1, 1, 20, 1, 1, 1, 1, 5, 1, 1, 2, 1, 132, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The numerators appear in A290317, where more information is found.

The LCM of row n seems to be A002790(n).

The first column is given by A006233.

LINKS

Table of n, a(n) for n=0..65.

EXAMPLE

The triangle T(n, k) begins:

n\k     0 1 2 3 4 5 6 7 8 9 10 ...

0:      1

1:      2 1

2:      6 1 1

3:      4 1 2 1

4:     30 1 1 1 1

5:      4 1 1 3 2 1

6:     84 1 1 1 2 1 1

7:     24 1 1 3 4 1 2 1

8:     90 1 1 1 1 1 3 1 1

9:     20 1 1 1 1 5 1 1 2 1

10:   132 1 1 1 1 1 1 1 2 1  1

...

For the first rows of the rational triangle r(n, m) see A290317.

CROSSREFS

Cf. A002790, A006233, A290317 (numerators).

Sequence in context: A196839 A295315 A089808 * A139547 A323855 A126342

Adjacent sequences:  A290315 A290316 A290317 * A290319 A290320 A290321

KEYWORD

nonn,easy,frac,tabl

AUTHOR

Wolfdieter Lang, Aug 06 2017

EXTENSIONS

Definition corrected by Eric M. Schmidt, Dec 16 2017

STATUS

approved

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Last modified November 12 14:43 EST 2019. Contains 329058 sequences. (Running on oeis4.)