24030

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 62.at n=4A031740
• Triangular array generated by its row sums: T(n,0) = 1 for n >= 0, T(n,1) = r(n-1), T(n,k) = T(n,k-1) - (-1)^k * r(n-k) for k = 2, 3, ..., n, n >= 2, r(h) = sum of the numbers in row h of T.at n=51A054090
• T(n,n-3), array T as in A054090.at n=6A054095
• a(n) = 25*n^2 + 5.at n=30A158445
• The Wiener index of the para-polyphenyl chain with n hexagons (see the Dou et al. and the Deng references).at n=9A216112
• Numbers n such that sum of cubes of digits of n equals the sum of prime divisors of n.at n=12A217531
• Triangle read by rows: T(n,k) appears in the transformation Sum_{k=0..n} (k+1)*x^k = Sum_{k=0..n} T(n,k)*(x-2k)^k.at n=33A253382
• Indices of rows of triangle A262432 where the maximum term of the row is a new record.at n=28A262464
• Sums of two primes (in increasing order) when equal to the product of their prime-counting functions.at n=13A272860
• Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=5A303012
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=41A303016
• Number of 6Xn 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=3A303020
• Starts of runs of 3 consecutive Pell-Niven numbers (A352320).at n=18A352322
• Number for rooted ordered trees with edge weights summing to n, where edge weights are all greater than zero, and the sequences of edge weights in all downward paths are strictly increasing.at n=13A384938