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A332601 An RNA-type Riordan lower-triangular matrix, read by rows. 0
1, 1, 1, 2, 2, 1, 4, 4, 3, 1, 8, 9, 7, 4, 1, 17, 20, 17, 11, 5, 1, 37, 45, 41, 29, 16, 6, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

He, Tian-Xiao. "A-sequences, Z-sequence, and B-sequences of Riordan matrices." Discrete Mathematics 343.3 (2020): 111718. Also arXiv:1909.02639.

LINKS

Table of n, a(n) for n=0..27.

EXAMPLE

Triangle begins:

1,

1, 1,

2, 2, 1,

4, 4, 3, 1,

8, 9, 7, 4, 1,

17, 20, 17, 11, 5, 1,

37, 45, 41, 29, 16, 6, 1,

...

CROSSREFS

Sequence in context: A106522 A128175 A104040 * A182222 A225639 A110664

Adjacent sequences:  A332598 A332599 A332600 * A332602 A332603 A332604

KEYWORD

nonn,tabl,more

AUTHOR

N. J. A. Sloane, Mar 06 2020

STATUS

approved

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Last modified July 10 23:30 EDT 2020. Contains 335600 sequences. (Running on oeis4.)