A322101 - OEIS

A322101

Numbers whose square can be written as the average of two positive cubes in more than one way.

19494, 155952, 447174, 526338, 1247616, 1788696, 2436750, 3577392, 4210704, 5978882, 6686442, 8596854, 9142686, 9344846, 9980928, 11973150, 12073698, 14211126, 14309568, 16875664, 19494000, 25946514, 28619136, 30955750, 33685632, 33957846, 42828318, 47831056

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OFFSET

1,1

COMMENTS

The first square with 3 representations is that of a(103) = 835805250, which can be written as (139650^3 + 1117200^3)/2, (395010^3 + 1101240^3)/2, and (628425^3 + 1047375^3)/2.

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

19494 is a term because 19494^2 can be written as (114^3 + 912^3)/2 and (513^3 + 855^3)/2.

CROSSREFS

Cf. A186885, A267477.

Sequence in context: A345574 A345575 A345831 * A206274 A033869 A031801

Adjacent sequences: A322098 A322099 A322100 * A322102 A322103 A322104

KEYWORD

nonn

AUTHOR

Giovanni Resta, Nov 26 2018

STATUS

approved