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A225258 T(n,k)=Number of distinct values of the sum of n products of three 0..k integers 9
2, 5, 3, 11, 12, 4, 17, 36, 20, 5, 31, 75, 63, 28, 6, 41, 157, 141, 90, 36, 7, 66, 254, 284, 205, 117, 44, 8, 81, 434, 478, 409, 269, 144, 52, 9, 101, 635, 780, 694, 534, 333, 171, 60, 10, 121, 911, 1156, 1123, 910, 659, 397, 198, 68, 11, 174, 1237, 1667, 1668, 1466, 1126 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

..2..5..11..17...31...41...66...81..101..121...174...195...267...302...344

..3.12..36..75..157..254..434..635..911.1237..1734..2162..2908..3611..4461

..4.20..63.141..284..478..780.1156.1667.2298..3111..4012..5213..6520..8063

..5.28..90.205..409..694.1123.1668.2396.3298..4442..5741..7410..9266.11443

..6.36.117.269..534..910.1466.2180.3125.4298..5773..7469..9607.12010.14818

..7.44.144.333..659.1126.1809.2692.3854.5298..7104..9197.11804.14754.18193

..8.52.171.397..784.1342.2152.3204.4583.6298..8435.10925.14001.17498.21568

..9.60.198.461..909.1558.2495.3716.5312.7298..9766.12653.16198.20242.24943

.10.68.225.525.1034.1774.2838.4228.6041.8298.11097.14381.18395.22986.28318

.11.76.252.589.1159.1990.3181.4740.6770.9298.12428.16109.20592.25730.31693

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..1703

FORMULA

Empirical: column k is n*k^3 - A225263(k) for large n (n>4 suffices through k=138)

CROSSREFS

Row 1 is A027426

Sequence in context: A185061 A129198 A122442 * A162613 A120858 A124937

Adjacent sequences:  A225255 A225256 A225257 * A225259 A225260 A225261

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin May 04 2013

STATUS

approved

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Last modified October 19 21:28 EDT 2019. Contains 328244 sequences. (Running on oeis4.)