49170

Appears in sequences

• Euler transform of Euler totient function phi(n), cf. A000010.at n=24A061255
• Numbers k such that usigma(k) is a square and sets a new record for such squares.at n=31A064443
• Self-convolution of A180711.at n=42A180712
• Numbers which are both the sum of n+1 consecutive triangular numbers and the sum of the n-1 immediately following triangular numbers.at n=9A222716
• Constant term in the expansion of (Sum_{k=0..n} k*(x^k + x^(-k)))^4.at n=5A305167
• Square array A(n,k), n>=0, k>=0, read by antidiagonals, where A(n,k) is the constant term in the expansion of (Sum_{j=0..n} j*(x^j + x^(-j)))^k.at n=50A322549
• Products of 5 distinct primes that are sandwiched between twin prime numbers.at n=33A376380