137541

Appears in sequences

• a(n) = n^4 + n^3 + n^2.at n=19A100019
• a(0)=0, a(1)=1, a(2n)=19*a(n), a(2n+1)=a(2n)+1.at n=28A197353
• Odd numbers k that have a divisor d such that sigma(d)*d is equal to k.at n=9A327599
• Numbers k such that squarefree part of sigma(k) is equal to squarefree part of 2*k.at n=20A331752
• Square array A(n, k) = A064987(A246278(n, k)), read by falling antidiagonals; A064987(n) = n*sigma(n), applied to the prime shift array.at n=43A379499
• Square array A(n, k) = A249670(A246278(n, k)), read by falling antidiagonals; A249670(n) = A017665(n)*A017666(n), applied to the prime shift array.at n=43A379500