31409

Appears in sequences

• a(1)=1, a(n) is the smallest integer > a(n-1) such that the sum of elements of the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals n*(n+1)/2 the n-th triangular number.at n=32A071184
• Expansion of 1/(1-x-x^2-x^6).at n=21A120400
• Numbers k such that 2*k+1, 3*k+2, 4*k+3 and 5*k+4 are primes.at n=29A138700
• Number of binary strings of length n with no substrings equal to 0000 or 0010.at n=17A164387
• Number of binary strings of length n with no substrings equal to 0000, 0011, or 1001.at n=19A164428
• Expansion of 1/(1 -x -x^2 -x^6 -x^24 - ... -x^(k!) - ... ).at n=21A217283
• Number of non-equivalent (mod D_3) ways to choose three points in an n X n X n triangular grid so that they do not form a 2 X 2 X 2 subtriangle.at n=12A237530
• Positions of zeros in A345055, which is the Dirichlet inverse of A011772.at n=50A345053
• Positions of zeros in A354875, which is the Dirichlet inverse of A344005.at n=11A354877
• Main diagonal of array in A358304, divided by 2.at n=42A358307