cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A377853 Sum over all multiplicative partitions mu of n whose sum is also n (with factors >= 1), of the encoding as Product_{j in mu} prime(j).

Original entry on oeis.org

2, 3, 5, 16, 11, 43, 17, 211, 223, 293, 31, 3221, 41, 1675, 7087, 53109, 59, 118973, 67, 382791, 174153, 47695, 83, 12164185, 3965025, 252005, 36536423, 36180075, 109, 268148849, 127, 2749874307, 81264777, 5800075, 1568669845, 39708983447, 157, 26345635, 1719664807
Offset: 1

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Author

Alois P. Heinz, Nov 09 2024

Keywords

Examples

			The multiplicative partitions of n=8 whose sum is also n are {[8], [4,2,1,1], [2,2,2,1,1]}, encodings give {prime(8), prime(4)*prime(2)*prime(1)^2, prime(2)^3*prime(1)^2} = {19, 7*3*2^2, 3^3*2^2} = {19, 84, 108}, the sum gives 211.
		

Crossrefs

Row sums of A377852.

Formula

a(prime(n)) = a(A000040(n)) = A006450(n).