42401

Appears in sequences

• n written in fractional base 6/4.at n=37A024637
• Number of partitions of n into parts not of the form 17k, 17k+8 or 17k-8. Also number of partitions with at most 7 parts of size 1 and differences between parts at distance 7 are greater than 1.at n=44A035969
• Form a conjugate partition of row with 1+1+1 in first row. all other rows are the union of their parents. a(n) = number of types of piles in the n-th row.at n=30A064480
• a(n) = floor(1/(n-1) * Sum_{k=1..n-1} a(k)^(n/k)), given a(0)=1, a(1)=2, a(2)=6.at n=13A079118
• Brilliant numbers k such that 2k+1 is also brilliant.at n=26A085649
• Semiprimes p such that next semiprime after p is p+20.at n=12A217335