66878

Appears in sequences

• Write the numbers from 1 to n^2 in a spiraling square; a(n) is the total of the sums of the two diagonals.at n=37A059924
• Numbers k such that k and k^2 use only the digits 2, 4, 6, 7 and 8.at n=28A137101
• Bases b in which the increasing concatenation of all primes smaller than b forms a prime number.at n=12A217040
• Number of solid standard Young tableaux of n cells and height ten.at n=4A273590
• Numbers k such that (19*10^k - 43)/3 is prime.at n=23A294377