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A281970 Number of sets of exactly n positive integers <= n+7 having a square element sum. 2
1, 2, 6, 15, 34, 71, 134, 238, 405, 660, 1030, 1559, 2310, 3336, 4691, 6500, 8886, 11899, 15709, 20584, 26624, 33926, 42974, 54080, 67172, 82800, 101787, 124031, 149660, 180251, 216171, 256730, 303737, 359036, 421356, 491196, 572792, 665539, 767239, 883380 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

FORMULA

a(n) = A281871(n+7,n).

EXAMPLE

a(3) = 15: {1,2,6}, {1,3,5}, {1,5,10}, {1,6,9}, {1,7,8}, {2,3,4}, {2,4,10}, {2,5,9}, {2,6,8}, {3,4,9}, {3,5,8}, {3,6,7}, {4,5,7}, {6,9,10}, {7,8,10}.

CROSSREFS

A diagonal of A281871.

Sequence in context: A246320 A101352 A192980 * A221719 A095380 A287012

Adjacent sequences:  A281967 A281968 A281969 * A281971 A281972 A281973

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Feb 03 2017

STATUS

approved

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Last modified November 14 17:24 EST 2019. Contains 329126 sequences. (Running on oeis4.)