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A120119 Multiplicative function from integers to sums of two squares. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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".

LINKS

Table of n, a(n) for n=1..64.

FORMULA

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

CROSSREFS

Cf. A001481, A055025, A000040.

Sequence in context: A123302 A227368 A339597 * A298011 A048678 A271586

Adjacent sequences:  A120116 A120117 A120118 * A120120 A120121 A120122

KEYWORD

mult,easy,nonn

AUTHOR

Franklin T. Adams-Watters, Aug 15 2006

STATUS

approved

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Last modified April 14 01:17 EDT 2021. Contains 342941 sequences. (Running on oeis4.)