A367393 a(n) = A103136(2*n, n), the central terms of the inverse of the Delannoy triangle.

1, -3, 22, -194, 1838, -18082, 182054, -1861890, 19258078, -200898626, 2109785654, -22275498434, 236225927182, -2514344180194, 26845804973638, -287403142763522, 3084015902579646, -33160937871888514, 357206218412519510, -3853959574555396290, 41640758821142160110

Offset

0,2

Comments

A combinatorial interpretation in terms of Schroeder paths is given in A103136.

Links

Table of n, a(n) for n=0..20.

Prog

(SageMath)  # Using function A103136.
def A367393List(size):
    M = A103136(2*size)
    return [M[2*n][n] for n in range(size)]
print(A367393List(21))

Crossrefs

Cf. A103136.

Sequence in context: A001393 A046743 A121952 * A250888 A098618 A357031

Adjacent sequences: A367390 A367391 A367392 * A367394 A367395 A367396

Keyword

sign

Author

Peter Luschny, Nov 16 2023

Status

approved