Central column (ignoring the zeros) of A349813, or leading entries in rows of A349814.

A349819

Central column (ignoring the zeros) of A349813, or leading entries in rows of A349814.

Terms

    a(0) =3a(1) =1a(2) =3a(3) =4a(4) =20a(5) =31a(6) =182a(7) =304a(8) =1932a(9) =3364a(10) =22407a(11) =40044a(12) =275132a(13) =500522a(14) =3515564a(15) =6478784a(16) =46260604a(17) =86094668a(18) =622636764a(19) =1167752848a(20) =8531618640a(21) =16100882359a(22) =118615471982a(23) =225001039696

External references