42546
domain: N
Appears in sequences
- Numbers k such that usigma(k) is a square and sets a new record for such squares.at n=29A064443
- Triangle, read by rows, T(n, k) = 2*binomial(n, k)*binomial(n+1, k)/(k+1) - (k! - n! + (n-k)!).at n=39A176152
- Triangle, read by rows, T(n, k) = 2*binomial(n, k)*binomial(n+1, k)/(k+1) - (k! - n! + (n-k)!).at n=41A176152
- p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = 1 - S^3.at n=31A291723
- Square array read by antidiagonals, where the top row is the powers of 2 (A000079) and the other numbers are the sum of the neighbors in the preceding row.at n=53A375723