61143

Appears in sequences

• Decimal part of a(n)^(1/4) starts with a 'nine digits' anagram.at n=17A034279
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111-0001 pattern in any orientation.at n=11A147274
• a(n) is the number of 5 element sets of distinct integer-sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units, where one trapezoid has a larger base of n units.at n=34A391453