30611

Appears in sequences

• a(n) = 625*n^2 - 2*n.at n=6A158373
• Smallest odd number k>1 such that k*2^A000043(n)+1 is a prime number.at n=23A253027
• Smallest number with exactly n representations as a sum of six positive squares.at n=2A295701
• a(n) is the smallest k such that A340745(k) - k = n.at n=11A340825
• a(n) is the sum of n consecutive triangular numbers immediately preceding a triangular number T(k), which is also equal to the sum of n-1 consecutive triangular numbers immediately following T(k).at n=6A392441