126975

Appears in sequences

• Expansion of phi(x) / f(-x) in powers of x where phi(), f() are Ramanujan theta functions.at n=39A029552
• a(n) = bitwise OR of all terms of n-th row of Pascal's triangle.at n=19A104176
• a(n)=2(4^n-n*2^n)-1.at n=8A186942
• Composite numbers n such that the sum of proper divisors of n divides 2^n+1.at n=24A278337
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 805", based on the 5-celled von Neumann neighborhood.at n=19A286830
• 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=24A387410