20086

Appears in sequences

• Numbers k such that prime(k) + prime(k+1) + prime(k+2) is a square.at n=23A076305
• Numbers k such that k*sigma(k) is a palindrome.at n=9A115890
• Number of binary strings of length n with equal numbers of 0001 and 1010 substrings.at n=16A164163
• Sum of the odd parts in the partitions of n into 7 parts.at n=34A309624
• Number of solutions to +- 1^3 +- 2^3 +- 3^3 +- ... +- n^3 = n^3.at n=32A368845
• a(n) = the smallest k such that Fibonacci(k) begins and ends with n, where Fibonacci(k) > n, or -1 if there are none.at n=22A374026