40515

Appears in sequences

• Base-9 palindromes that start with 6.at n=34A043033
• Q(n,6), where Q(m,k) is defined in A127080 and A127137.at n=43A127148
• Numbers n with following property: suppose n^6 = d1 d2 d3 ...dk in decimal; then d1! + d2! + ... + dk! is a square.at n=16A130688
• Numbers k such that (13*10^k + 437)/9 is prime.at n=21A282351
• Expansion of Product_{k>=1} (1 + x^(2*k-1))^(k*(3*k-1)/2)*(1 + x^(2*k))^(k*(3*k+1)/2).at n=16A294839
• Numbers k such that 455*2^k+1 is prime.at n=26A323197
• Number of integer partitions of n with frequency depth floor(sqrt(n)).at n=44A325252
• Recurrence a(1) = 1, a(2) = 5; a(n) = (a(n-1) + a(n-2))/GCD(a(n-1),a(n-2)) + 1.at n=32A349576
• Numbers k such that A353802(k) / sigma(sigma(k)) is an integer > 1, where A353802(n) = Product_{p^e||n} sigma(sigma(p^e)).at n=27A353807
• a(n) = greatest number in row n of the array in A225485.at n=43A364810