50142

Appears in sequences

• Pentagonal numbers for which the sum of the digits is also a pentagonal number.at n=21A117709
• Pentagonal numbers for which both the sum of the digits and the product of the digits are pentagonal numbers.at n=11A117711
• Smallest integer m such that gcd{x | sum of proper divisors of x is m} is equal to 2*n, when there are at least two such x's.at n=32A253303
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 363", based on the 5-celled von Neumann neighborhood.at n=42A268154
• Hyper-Wiener index of rows of unit cells on the face-centered cubic lattice.at n=6A302256
• Pentagonal numbers which are products of four distinct primes.at n=30A381919