60726

Appears in sequences

• Numbers k such that phi(k) is equal to A008473(k-1).at n=13A039780
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,45.at n=23A064259
• a(n) = p(n)*(p(n)-1)/2 where p(n) = upper member of n-th pair of twin primes.at n=20A082669
• Triangular numbers which are the sum of distinct double factorials (A006882).at n=30A115650
• Triangular numbers whose digit reversal is the product of 2 palindromes greater than 1.at n=38A115702
• Triangular numbers which are sums of 6 consecutive primes.at n=8A173423
• a(n) = A185128(n) + A185129(n).at n=9A185243