23766

Appears in sequences

• Distinct even numbers in writing first numerator and then denominator of each element of the 1/4-Pascal triangle (by row).at n=17A046589
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,5.at n=36A064239
• a(n) = Sum_{i=1..n} LookAndSay(i).at n=30A079664
• a(n) = (n+1)(n+2)(n+3)(2n+3)(10n^2 + 27n + 20)/360.at n=7A108673
• Number of forests on unlabeled nodes with n edges and no single node trees.at n=14A215930
• Numbers n such that n^3 contains the consecutive substring 2,3,5,7.at n=22A295900
• Numbers k such that the largest prime divisor of k^4+1 is less than k.at n=27A309562
• a(n) = ((p-1)^n + (p+1)^n) mod p^2, where p is the n-th prime.at n=50A379544
• Centered pentagonal numbers which are the products of four distinct primes.at n=3A382451
• Centered pentagonal numbers that are abundant.at n=16A382696