21565

Appears in sequences

• Antidiagonal sums of triangle A123610.at n=15A123612
• 1/3 the number of n X n 0..2 symmetric matrices with every element equal to two, three or four horizontal and vertical neighbors.at n=6A211050
• Numerators of increasingly better rational approximations to log(3)/log(2) with increasing denominators.at n=22A254351
• Numerators of fractions converging to limiting value of Fekete polynomials.at n=4A280034
• Number of series-reduced rooted trees whose leaves are integer partitions whose multiset union is an integer partition of n with no 1's.at n=16A320293
• Numbers k > 1 such that (3/2)^k sets a new record for closest fractional part to 1/2.at n=9A334264
• Number of strict compositions of n with alternating parts strictly decreasing.at n=43A342343
• Number of partitions of 4n whose xor-sum is 2n.at n=14A370874