A297630 Row sums of A297628.

1, 2, 5, 20, 137, 1478, 22925, 481448, 13138193, 451749962, 19104365333, 974417603132, 58981977530777, 4179837144348686, 342799255549127837, 32212592211380729168, 3438255899105307857441, 413670348773363088131474, 55722273751954119897519653

Offset

0,2

Comments

Apparently (apart from offset) the same as A297629, essentially column 1 of A297628 - R. J. Mathar, Jan 09 2018

Links

Table of n, a(n) for n=0..18.

Prog

(Julia)
function A297630List(len::Int)
    R = Array{BigInt}(len)
    A = fill(BigInt(0), len+1); A[1] = 1
    for n in 1:len
        for k in n:-1:2 A[k] += A[k+1] end
        for k in 2: 1:n A[k] += A[k-1] end
        R[n] = sum(A[1:n])
    end
    return R
end
println(A297630List(19))

Crossrefs

Cf. A297628, A297629.

Sequence in context: A156073 A006366 A012317 * A297629 A118181 A140988

Adjacent sequences: A297627 A297628 A297629 * A297631 A297632 A297633

Keyword

nonn

Author

Peter Luschny, Jan 02 2018

Status

approved