A248113 - OEIS

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A248113

Number of subsets of {1,...,n} containing n and having at least one set partition into 4 blocks with equal element sum.

1

1, 2, 6, 14, 37, 88, 218, 515, 1226, 2848, 6566, 14997, 33483, 74406, 162422, 351621, 751171, 1594028

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OFFSET

7,2

LINKS

Table of n, a(n) for n=7..24.

EXAMPLE

a(7) = 1: {1,2,3,4,5,6,7}-> 16/25/34/7.

a(8) = 2: {1,2,3,5,6,7,8}-> 17/26/35/8, {1,2,3,4,5,6,7,8}-> 18/27/36/45.

CROSSREFS

Column k=4 of A248112.

Sequence in context: A006653 A171924 A144530 * A339985 A026598 A006864

Adjacent sequences: A248110 A248111 A248112 * A248114 A248115 A248116

KEYWORD

nonn,more

AUTHOR

Alois P. Heinz, Oct 01 2014

STATUS

approved