45100

Appears in sequences

• Triangle of numbers relating two sequences A073155 and A073156.at n=42A073153
• Row sums of triangle A144825.at n=40A144826
• Numbers k such that the average digit of k^2 is 1.at n=33A164771
• Let (n)_p denote the exponent of prime p in the prime power factorization of n. Then a(n) is defined by the formulas a(1)=1; for n >= 2, (a(n))_2 = (n)_2, (a(n))_3 = (n)_3 and, for p >= 5, (a(n))_p = 1 + ((2n)/(p-1))_p if p-1|2*n, and (a(n))_p = 0 otherwise.at n=19A202318
• a(0)=a(1)=1, a(n) = least k > a(n-1) such that k*a(n-2) is a triangular number.at n=42A214961
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 507", based on the 5-celled von Neumann neighborhood.at n=37A272587
• Numbers k such that sum of digits (k) and sum of digits (k^2) is 10.at n=19A325451