25994

Appears in sequences

• a(0) = 1, a(n) = 18*n^2 + 2 for n>0.at n=38A010008
• Partial sums of A120769.at n=50A120770
• Numbers n such that sigma(sigma(phi(n))) = sigma(sigma(n)).at n=33A172466
• Coefficient array of the second column of the inverse of the Riordan array ((1+(r+1)x)/(1+(r+2)x+rx^2), x/(1+(r+2)x+rx^2)).at n=39A188463
• Numbers k such that Bernoulli number B_{k} has denominator 498.at n=38A282773
• Expansion of Product_{k>=1} 1/(1 - x^k)^(2^k-1).at n=11A319918
• Numbers k such that the product of distinct digits of k equals the sum of the prime divisors of k.at n=31A357262
• Number of tilings of a 5 X n rectangle using n pentominoes of shapes T, N, X.at n=45A361250
• a(n) is the first positive number k such that k is alternately a quadratic residue and nonresidue modulo the first n primes, but not the n+1'th.at n=14A377380
• Rank of the partition of n formed by the terms of its binary expansion from largest to smallest.at n=37A380207