A120119 Multiplicative function from integers to sums of two squares.

1, 2, 5, 4, 9, 10, 13, 8, 25, 18, 17, 20, 29, 26, 45, 16, 37, 50, 41, 36, 65, 34, 49, 40, 81, 58, 125, 52, 53, 90, 61, 32, 85, 74, 117, 100, 73, 82, 145, 72, 89, 130, 97, 68, 225, 98, 101, 80, 169, 162, 185, 116, 109, 250, 153, 104, 205, 106, 113, 180, 121, 122, 325, 64

Offset: 1

Author

Franklin T. Adams-Watters, Aug 15 2006

Keywords

• mult
• easy
• nonn

Comments

The values here are a rearrangement of A001481. The numbers in A001481 have unique factorization (with factors restricted to A001481), with the numbers in A055025 being the "primes".

Crossrefs

Cf. A001481, A055025, A000040.

Formula

Totally multiplicative with a(Prime(k)) = A055025(k).