23517

Appears in sequences

• Expansion of g.f. 1/((1-2*x)*(1-7*x)).at n=5A016130
• Number of n-crossing hyperbolic knots having symmetry group D1.at n=14A052415
• 30 'Reverse and Add' steps are needed to reach a palindrome.at n=8A065319
• Numbers k such that (10^k - 1)/3 + 4*10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime).at n=12A077790
• Array read by antidiagonals: T(n, k) = ((n+4)^k-(n-1)^k)/5.at n=51A102765
• Numbers k such that k and 4*k, taken together, are pandigital.at n=6A115924
• a(n) = n*prime(prime(n)) - prime(n).at n=31A230285
• Not appropriate for the OEIS.at n=11A248690
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 454", based on the 5-celled von Neumann neighborhood.at n=44A272278
• Numbers with at least three digits and with the property that the sum of the cubes of the first and last digit equals the number obtained when the first and last digits are deleted.at n=41A275343
• Unary-binary representation of Stern polynomials: a(n) = A156552(A260443(n)).at n=55A277020
• Odd bisection of A277020: a(n) = A277020(2n+1).at n=27A277189
• Sum of all numbers in bijective base-n numeration with digit sum n.at n=6A332711
• Number of ways to write n as an ordered sum of 6 squarefree numbers.at n=24A341066