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

Author

Peter Luschny, Jan 02 2018

Keywords

• nonn

Comments

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

Crossrefs

Cf. A297628, A297629.

Programs

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))