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A231331 Number of distinct terms in row n of triangle A230871. 4
1, 1, 2, 3, 6, 10, 20, 35, 74, 130, 258, 473, 1007, 1830, 3912, 7093, 15233, 27831, 60458, 109555, 239039, 433654, 946849 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Length of row n in triangle A231330.

LINKS

Table of n, a(n) for n=0..22.

PROG

(Haskell)

a231331 = length . a231330_row

CROSSREFS

Cf. A231335.

Sequence in context: A036557 A173125 A047131 * A008927 A331488 A052525

Adjacent sequences: A231328 A231329 A231330 * A231332 A231333 A231334

KEYWORD

nonn,more

AUTHOR

Reinhard Zumkeller, Nov 07 2013

STATUS

approved

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Last modified February 7 02:40 EST 2023. Contains 360111 sequences. (Running on oeis4.)