70525

Appears in sequences

• 4-dimensional analog of centered polygonal numbers.at n=26A006325
• a(n) = [ a(n-1)/a(1) + a(n-1)/a(2) + ... + a(n-1)/a(n-1) ] for n >= 3, with initial terms 2,1.at n=12A022873
• Numbers that, when expressed in base 8 and then interpreted in base 10, yield a multiple of the original number.at n=13A032551
• Duplicate of A032551.at n=13A062945
• Numbers that divide the average of the sum of the squares of their divisors.at n=7A255244
• 29-gonal pyramidal numbers: a(n) = n*(n+1)*(9*n-8)/2.at n=25A256649
• Pentagonal numbers (A000326) in which parity of digits alternates.at n=27A297644
• The first of two consecutive pentagonal numbers the sum of which is equal to the sum of two consecutive primes.at n=5A298463
• a(n) = (A001359(n+1)^2 - 1)/24, where A001359 = lesser of twin primes; or: pentagonal numbers (A000326) whose indices are twin ranks (A002822).at n=43A308344
• Numbers that are the sum of four third powers in ten or more ways.at n=18A345155
• Numbers that are the sum of four third powers in exactly ten ways.at n=12A345156
• Numbers k such that the sum of the squares of the odd divisors of k (A050999) is divisible by k.at n=25A355543