57855

Appears in sequences

• Denominator of |Bernoulli(2n+2)| - |Bernoulli(2n)|.at n=27A029765
• Odd numbers with exactly 5 distinct prime factors.at n=28A046391
• The hyper-Wiener index of the triangular graph T(n) (n >= 1).at n=20A228317
• Integers of the form 8k + 7 that can be written as a sum of four distinct squares of the form m, m + 1, m + 3, m + 5, where m == 2 (mod 4).at n=29A243580
• Number of length n+5 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=16A256820
• Triangle read by rows, Bell transform of Bell numbers.at n=61A264428
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 475", based on the 5-celled von Neumann neighborhood.at n=42A272449
• Numbers k such that the odd part of (1+k) divides (1 + odd part of sigma(k)).at n=25A336700
• Numbers k for which A000265(1+A000265(sigma(k))) is equal to A000265(1+k).at n=9A336701
• Square array T(m,n) read by antidiagonals, satisfying shifted Catalan recurrences: T(m,0) = 1 and T(m,n) = Sum_{k=0..n-1} T(m,k) * T(m,(n-1-k+m) mod n) for all n > 0.at n=62A341359
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A048250(k)), where A048250 is sum of the squarefree divisors of n.at n=21A387410
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A001615(k)), where A001615 is Dedekind's psi-function.at n=19A387415
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A034448(k)), where A034448 is unitary sigma (usigma).at n=21A387418
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A003959(k)), where A003959 is multiplicative with a(p^e) = (p+1)^e.at n=24A387419