20679

Appears in sequences

• Numbers k such that k and 2*k, taken together are pandigital.at n=12A115922
• Number of (5,2)-noncrossing partitions of [n].at n=9A141080
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.at n=11A147470
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.at n=24A147472
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.at n=25A147472
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (1, 0, 0), (1, 0, 1), (1, 1, 1)}.at n=7A151174
• Numbers k such that the coefficient of x^k in the expansion of Product_{j>=1} (1 - x^j)^5 is zero.at n=28A302057
• Total sum over all j in [n] of the number of partitions of [j*(n-j)] into (n-j) sets of size j having no set of consecutive numbers whose maximum (if j>0) is a multiple of j.at n=7A370368