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A261646
Row lengths in A261644.
5
1, 1, 1, 3, 5, 7, 15, 27, 49, 90, 171, 326, 613, 1174, 2255, 4333, 8386, 16213, 31457, 61097, 118577, 230322, 447767, 870570, 1693887, 3297343, 6423347, 12523562, 24435171, 47707012, 93215393, 182260604, 356622869, 698284551, 1368195878, 2682527954, 5262729874, 10330704931
OFFSET
1,4
COMMENTS
First differences of A261396;
also row lengths in A261712.
FORMULA
a(n) = A261396(n) - A261396(n-1).
PROG
(Haskell)
a261646 = length . a261644_row
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Aug 31 2015
EXTENSIONS
a(21)-a(38) from Chai Wah Wu, Aug 31 2015
STATUS
approved