A269122 Number of sequences with n copies each of 1,2,3,4 avoiding the pattern 1234.

1, 23, 1879, 173891, 16140983, 1474050783, 132279480115, 11690616534627, 1020149742404727, 88094027572412735, 7541872062618216079, 641058122723345275763, 54163773797158984485203, 4553249681522845632696611, 381122944171897823109474291

Offset: 0

Author

Alois P. Heinz, Feb 19 2016

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..525

Crossrefs

Row n=4 of A269129.

Cf. A008977, A268840.

Formula

a(n) = A008977(n) - A268840(n).