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A318598 Number of n-member subsets of [10*n] whose elements sum to a multiple of ten. 2
1, 1, 18, 406, 9158, 211880, 5005980, 119877472, 2898762854, 70625252863, 1731030733840, 42634215112710, 1054285960975268, 26159486052576800, 650961394904288192, 16239221627803363280, 405994987399334500710, 10169699086799914175514, 255172150241034559336782 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..710

EXAMPLE

a(2) = 18: {1,9}, {1,19}, {2,8}, {2,18}, {3,7}, {3,17}, {4,6}, {4,16}, {5,15}, {6,14}, {7,13}, {8,12}, {9,11}, {10,20}, {11,19}, {12,18}, {13,17}, {14,16}.

CROSSREFS

Column k=10 of A318557.

Sequence in context: A116421 A298465 A260655 * A215229 A172135 A005477

Adjacent sequences:  A318595 A318596 A318597 * A318599 A318600 A318601

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Aug 29 2018

STATUS

approved

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Last modified September 25 06:05 EDT 2020. Contains 337335 sequences. (Running on oeis4.)