42315

Appears in sequences

• Number of n-bead bracelets (turnover necklaces) of two colors with 6 red beads and n-6 black beads.at n=33A005513
• Odd numbers with exactly 5 distinct prime factors.at n=14A046391
• Numbers k such that sigma(sigma(sigma(k))) == 6*sigma(k).at n=34A067065
• Array read by rows in which the n-th row contains the multiples of n in increasing order using all the digits of first n numbers.at n=35A078189
• Odd squarefree abundant numbers.at n=12A112643
• Odd infinitary abundant numbers.at n=33A127666
• Odd unitary abundant numbers.at n=12A129485
• Smallest order of the cyclotomic polynomial whose maximal coefficient in absolute value is n.at n=27A136418
• Odd squarefree numbers n such that the cyclotomic polynomial Phi(n,x) is not coefficient convex.at n=22A146960
• The triangle in A151338 read by rows downwards.at n=60A151509
• The triangle in A151338 read by rows upwards.at n=60A151510
• a(n) = ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 4.at n=29A160892
• Products of 5 distinct primes a,b,c,d,e, such that a+b+c+d+e are prime numbers.at n=2A178782
• Numbers k such that sopfr(k + bigomega(k)) = sopfr(k).at n=38A187877
• Numbers k such that sopfr(k + omega(k)) = sopfr(k), where sopfr(i) = A001414(i) and omega(i) = A001221(i).at n=30A187878
• Denominator of Sum_{k=1..n} 1/A045542(k).at n=6A214391
• The positions of records in A236747.at n=13A237267
• Primitive, odd, squarefree abundant numbers.at n=12A249263
• Number of relaxed compacted binary trees of right height at most one with minimal sequences between branch nodes except before the first and after the last branch node on level 0.at n=7A288954
• Decimal encoding T(n,k) of the k-th non-averaging permutation of [n]; triangle T(n,k), n >= 0, k = 1..A003407(n), read by rows.at n=32A292523