26453

Appears in sequences

• Let N(k) and D(k) be the sequences defined in A054765 and A012244; write N(k)* D(k+j ) - N(k+j)*D(k) = (-1)^(k+1)*(k!)^2*P(k) where P(k) is a polynomial in k of degree j-1; sequence gives coefficients of expansion of P(k) in powers of k for j=1,2,3,...at n=18A054798
• Number of toothpicks after n stages of 3-D toothpick structure defined in Comments.at n=33A170876
• Number of binary strings of length n+5 such that the smallest number whose binary representation is not visible in the string is 7.at n=12A261443
• a(n) is the row of the Trithoff (tribonacci) array that contains the tails of the sequence which is n times the tribonacci numbers.at n=33A351685
• Squarefree semiprimes k such that k+1 is the product of three distinct primes and k+2 is the product of four distinct primes.at n=39A376352