30460

Appears in sequences

• a(n) is the (n+1)st (n+2)-gonal number.at n=39A064808
• Symmetric square table of coefficients, read by antidiagonals, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies: f(x,y) = g(x,y) + xy*f(x,y)^4 and where g(x,y) satisfies: 1 + (x+y-1)*g(x,y) + xy*g(x,y)^2 = 0.at n=48A089447
• Symmetric square table of coefficients, read by antidiagonals, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies: f(x,y) = g(x,y) + xy*f(x,y)^4 and where g(x,y) satisfies: 1 + (x+y-1)*g(x,y) + xy*g(x,y)^2 = 0.at n=51A089447
• Sum of squares of four consecutive primes.at n=21A133524
• Triangle, read by rows, T(n, k) = 1 - floor(n*(n-1)/4) + floor(binomial(n-1,k-1) * binomial(n, k-1)/(2*k)).at n=49A176125
• Triangle, read by rows, T(n, k) = 1 - floor(n*(n-1)/4) + floor(binomial(n-1,k-1) * binomial(n, k-1)/(2*k)).at n=50A176125
• Number of compositions (ordered partitions) of n into at least 2 distinct positive parts.at n=29A216695
• Number of compositions (ordered partitions) of n into distinct parts all relatively prime to n.at n=29A332002
• Number of compositions (ordered partitions) of n into distinct and relatively prime parts.at n=29A332004
• Centered triangular numbers that are pseudoperfect (semiperfect).at n=10A377747