7,2

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

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.

Column k=4 of A248112.

Sequence in context: A006653 A171924 A144530 * A339985 A026598 A006864

Adjacent sequences: A248110 A248111 A248112 * A248114 A248115 A248116

nonn,more

Alois P. Heinz, Oct 01 2014

approved