427440

Appears in sequences

• Number of positive integers <= 2^n of form x^2 + 15 y^2.at n=22A054229
• a(n) = prime(n+1)^4 - prime(n)^4.at n=8A276963
• The number of n X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <=3 . Triangle T(n>=0, 0<=k<=n) read by rows.at n=24A301390