183708

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*3^j.at n=38A038221
• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*3^j.at n=42A038221
• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*6^j.at n=30A038224
• Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*3^j.at n=33A038257
• Triangle read by rows. T(n, m) are the coefficients of Sidi polynomials.at n=38A075513
• Triangle, read by rows, that equals the matrix inverse of A071207 when treated as a lower triangular matrix.at n=48A089962
• Riordan array (1, 3+3x).at n=63A099093
• a(n) = (n^3 + n^2)*3^n.at n=5A129003
• Averages of twin prime pairs k such that k*7 and k/7 are squares.at n=7A154673
• Numbers n such that (A000203(n)+28)/n is an integer.at n=18A162302
• Triangle t(n,m)= (m+1)^n*binomial(n,m) if m <= n/2, otherwise t(n,m) = t(n,n-m).at n=38A167034
• Triangle t(n,m)= (m+1)^n*binomial(n,m) if m <= n/2, otherwise t(n,m) = t(n,n-m).at n=42A167034
• Numbers m that divide sigma(sigma(m) - m) where sigma is the sum of divisors function (A000203).at n=28A300658
• 3-deficient numbers with increasing abundancy: Numbers k such that sigma(m)/m < sigma(k)/k < 3 for all numbers m < k such that sigma(m)/m < 3.at n=22A307122
• Records in A009101.at n=37A354710
• Number of integer grid points on the circle around (0,0) with radius A088959(n).at n=27A365620