A003996 - OEIS

A003996

Sums of distinct nonzero squares in more than one way.

25, 26, 29, 30, 41, 45, 46, 49, 50, 53, 54, 61, 62, 65, 66, 69, 70, 74, 75, 77, 78, 79, 81, 82, 84, 85, 86, 87, 89, 90, 91, 93, 94, 95, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 109, 110, 111, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123

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OFFSET

1,1

COMMENTS

The largest integer not in this sequence is 132. Proof based on Theorem 3 from M. J. Wiener link: All the numbers from 148+1 to 148+12^2 are the sum of distinct squares from {1^2,...,11^2} in more than one way (direct calculation). This range can be extended indefinitely by adding 12^2, 13^2, etc. Numbers between 132 and 148 confirmed from A033461. - Martin Fuller, Aug 28 2023

LINKS

Table of n, a(n) for n=1..58.

M. J. Wiener, The Largest Integer Not the Sum of Distinct 8th Powers, J. Integer Sequences, 26 (2023), Article 23.5.4.

Index entries for sequences related to sums of squares

FORMULA

For n >= 65, a(n) = n + 68 (see comment). - Martin Fuller, Aug 28 2023

CROSSREFS

Cf. A033461, A003995.

Sequence in context: A242221 A186538 A340271 * A132415 A292931 A374910

Adjacent sequences: A003993 A003994 A003995 * A003997 A003998 A003999

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved