A369590 a(n) = number of Yamanouchi words of length n that start with 3.

0, 0, 1, 2, 5, 14, 44, 139, 475, 1658, 6146, 23495, 93840, 385956, 1643862, 7193783, 32446635, 150049734, 712619582, 3462870079

Offset

1,4

Links

Table of n, a(n) for n=1..20.

Crossrefs

Column 3 in A369588.

Cf. A000085, A238124, A369591.

Sequence in context: A137556 A137557 A306799 * A148335 A268419 A149883

Adjacent sequences: A369587 A369588 A369589 * A369591 A369592 A369593

Keyword

nonn,more

Author

Max Alekseyev, Jan 26 2024

Status

approved