A261646 Row lengths in A261644.

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

Author

Reinhard Zumkeller, Aug 31 2015

Keywords

• nonn

Comments

First differences of A261396;

also row lengths in A261712.

Crossrefs

Cf. A261644, A261712, A261396.

Programs

Haskell

a261646 = length . a261644_row

Formula

a(n) = A261396(n) - A261396(n-1).

Extensions

a(21)-a(38) from Chai Wah Wu, Aug 31 2015